I am interested in building the Phabbtone and I have a couple of questions.
1) If v3.5 the latest and greatest from the creator?
2) Has anyone done a vero layout of this?
3) Has anyone used this as the front end of an od?

Thanks!

Thanks Phatt, for the buffer/high Z thoughts! I will mull over some possible changes. I am actually quite pleased at the present with the tone, other than a bit to much bass and the noise issue, I am getting out of the pedal but please don't mistake my enthusiasm for raving. I realize I am a novice at tweaking build pedals but I have been listening to them since I bought my first Maestro Fuzztone in New York in 1966 after hearing "Satisfaction". I try not to base my decision to build a pedal on hype but there is always the first time. Again thank very much for the time you have spent on my build.

Update! Found the problem. One of the fets had  a slight disconnection when measuring. I also returned the bias to ~4.5v. Played for about an hour just tweaking knobs. I will resume bias tweaks on the overdrive stage tomorrow. Oh, everything sounds very good except that when the Level or Drive are increased on the OD channel it sounds like I get noise like water flowing?
Thanks again!!

One step forward, two steps back. Modded to  Phatt's suggestions and biased overdrive stage fets to 5v (?) based on tone, sounded good and turned pedal volume up and poof! something went south. No sound unless turned all the way up and then just faint in the background sound. Will have to troubleshoot tomorrow.

It was hard to part with but I traded one furshlugger for all the trim pots;). And yes I can tweak all nite long:0 ?
Next- Back to reality, Phatt, taking your advice I really don't need a 2db  loss. So, I used another trim pot to dial in R22 to 50K, and removed C2, C4, and R17. Spousal unit is napping currently so I cannot try it out.
What's next?, stage 3 and 4 or 5,6? Twice the control would be nice on my next pedal which will likely be as soon as I can wrap this one up. Thanks again for the help and humor!

Thanks much Loudthud! Sounds like plan. Tweaking is good when you can put all the pieces back! I think I may play with the bias voltage in the tone stack section also, I believe it has more gain than required. Interesting you mention the tone shaping on each stage.
The tone controls (T,B,M) all seem to interact. I still don't hear much difference in the 80's/90's switch. I would like to increase mids on one position of the switch. Would that just require a change in the rc network?
Again thanks for everyone's help!

100K Trim pot installed! Had a bit of time to tweak and settled in the area around 85K until I have more time. 68K seems to be a bit muffled. Certainly you both were correct, 150K is to high for my tastes. What I really need is someone to turn the pot while I play at different intensity to get a real feel.  What effect would reducing the bias voltage's have on the gain stages? When the drive or gain knobs are maxed out the gain is more than I would ever use. I do have the trim pot for the overdrive input VR2 set very low? Could this maybe be to low for the overdrive section? In my unknowing mind, could this mean the overdrive stages are trying to gain up a signal that is too weak?

Thanks for asking!
1) I used J201's.
2) I use a Dunlop "Brick" 9vdc/8vdc to power all my pedals.
3) All trim pots were adjusted to 4.5V. I have not tried any adjusting the input voltage. I believe that these are "cascaded" gain stages?, and I actually thought of cascading the voltage but I have no idea what that might achieve.
4) Installing a trim pot would be difficult but possible. I believe I might have a 50k or 100k I could try.
5) R32 = 470 ohm
6) Thanks very much!

Thanks Phatt! I was not sure how to set the link.

Phatt (he has given me some ideas to try), recommended that I post the schematic here as there are many SS experts here that could help resolve my pedal problems. First I need to give credit to Torben and  kusi at FSB for the schematic and Sabrotone for the layout. This is a dumble style pedal similar to the ROG umble. The schematic is in a pdf form so I added the link to it, http://www.freestompboxes.org/download/file.php?id=1579. I have built the pedal following the schematic and layout. It works but not as I had hoped. My main problem is I'm good at reading schmatics but need help with modding them. The pedal has what I believe is called "ice pick" overtones when the drive or gain is turned up or when heavy picking, (far from the smooth overdrive I was expecting). I was expecting a bit more midrange control. Others compare it to "chewing tin foil". This sound compares to my MIM strat with Tex Mex style pickups which I changed because of the ice pick sound. If some one with experience could look over the schematic and offer suggestions I would greatly appreciate it!

For some reason I am unable to open the audio files for the amp demo  :grr. Is there some program I don't have?