Boss BD2 Keeley mod ; help troubleshooting ; no clipping

[Vinz[35]]

Hi everybody

I tried to mod my Boss BD2 to the Keeley mod. I'm a begginer in modding/DIY. (BD2 schematic from premierguitar : https://www.premierguitar.com/ext/resources/archives/1c5448f5-204f-432f-a375-79e19f931811.JPG)

So this is what I did :

D3 - Change 1SS133 to a 1N4002 diode for asymmetrical clipping. This adds second order harmonics. This adds to the tube type sound. I like the sound of this change.
D7, D8, D9, D10 - Change 2 of of these diodes from 1SS133 to a single 1N4002. More second order harmonic distortion. Although the change is slight, I like it. We actually take out one of the two pairs and replace it with a single 1N4001.
C1, C6, C7, C12, C13, C15 - Change to 10uF Tantalum capacitors.
C14, C34 - Change to 0.1uF metal film capacitors
C20, C25 - Change to 100pf Silver Mica Capacitors
C21, C23 - Change to 47pf Silver Mica Capacitors
C22 - Change to 220pf Silver Mica Capacitors
C35, C36 - Change to .047uf Metal Film Capacitors (box-style)

But now when I turn the gain knob up, the volume is increasing but there is no clipping at all.
I checked the D7-8-9-10 diodes and they seem in the right direction. (pics : https://image.noelshack.com/fichiers/2019/10/7/1552219416-img-20190310-122934.jpg ; https://image.noelshack.com/fichiers/2019/10/7/1552219423-img-20190310-122858.jpg)
Do you know where it could come from ?

Thank you !

[GibsonGM]

Sounds like maybe you have a bad solder connection or trace, and the diodes aren't in-circuit?  There could be several reasons for the symptoms you report.
Look at all your connections again...if you have a meter, check for continuity.

Read this.  Tho I think an audio probe may be in order:

https://www.diystompboxes.com/smfforum/index.php?topic=29816.0