I'm sure they will make to order, if you ask politely 

You should et out more 

Just kidding.

You could try a different capacitor value in the presence circuit in order to change the frequency point of same.

I ordered my OTS 50 without Trannies in order to reduce shipping weight and thereby reducing shipping costs.

Instead I used Hammond PT and choke. For OT I used a Mercury Magnetics that previously had ordered for a 59 Bassman Ri combo. I am satisfied with the sound, but can obviously not comment on how they compare to Nik's transformers.

For my latest build - a Dual High Plate/HRM - which I have sourced myself, I have used a set of old Partridge Tranformers from an old 70 Laney amp. I have 580volts on the two EL34 output tubes and it probably delivers 80 watts. Its way superior to my 50 watt ceriatone.

I hope my reply might inspire you even if it does not really answer your initial question. 

@simplkndofman21

Ok, stupid old me, no I get it........you are one of those guys who ask a question and other forumites spend time trying to help you out -  and after a while you will answer the question yourself...I never learn 

The reason why you rarely hear ACDC/Foreinger/Free/Bad Company -type of riffs recorded with Dumble style amps, is probably because Dumble amps are not particularly suited for crunch chords. The Dumble sound is too compressed for Chrunch chords IMHO. Go for a dryer amp/preamp like a Marshall/SSoldano/KRANK or whatever in that ballpark if you want crunch.

The OD master pot

When you put tolex on a cabinet, you usually let it cover 1-2 inches on the inside (from front and back). Therefore you dont see the rivets. Don't worry about it.

Yes it would. However, try a trimmer in series with a capacitor in order to find the sweet spot. When you have found a sound you like, simply measure the trimmer value and put a an ordinary resistor of same value in  the circuit.

If you amp is rather new. Have a little patience with the amp. It takes 50-100 hours to break in, which in effect will soften the tone. You can simulate this with the above mentioned trimmer. And adjust the trimmer on a weekly basis until the amp has settled in. Pretty smart huh?

Yes, exactly

I use 1n + 150k in my HRM
and
1n + 180k in my high plate non-HRM

I have found the values by trial and error comparing with the sound of having the dumblelator in the circuit.

The HRM has a pretty fizzy OD high end. Most of us are attracted to the Dumble type amps because of Robben Fords cremy sounds. However, remember that Robben Ford use a a Dumbleator (in series mode) connected with long connection wires to/from his TC2290. This effectively trims offs OD highs.

Alternatively to a dumbleator (in series mode) I use a 1n capacitor in series with a 150k resistor soldered to OD master pot in and ground. This trims off the fizzy highs in my HRM amp.

its simply a 9 volt hatch which are used on guitar pedals (like T-REX) and even guitars (like EMG equipped ones) from time to time

Nuff said

I still prefer JJ ECC83S in all three positions, tried EH ECC83, but the draw less current and consequently sounds brighter and thinner. I found this to be a general rule with the tubes I have i my old drawer, counting (OLD! not NOS) Mullards, Brimer, Siemens and GE7025.

Dumble seeker, when you try out different preamp tubes, try to measure the plate voltages (pin 1 to ground / pin6 to ground) and see if find the same connection betweeen brighter tubes, showing higher plate voltages. Could be interesting with a little field study. 

Great sounds, great chops!!

Try the "search" bottom. This topic has been described a million times on this and other forums like ampgarage.com.

 

and the extra weight