does anyone know the transformer dimensions for toneslut

[wsaraceni]

i have their iron. i sent it out to get longer leads put on and want to change it over to a laydown style transformer. i'm trying to get a chassis made for it off of the jtm45 ceriatone chassis. i figure this will be easy because later i can just get a gabkits headshell since he sizes them for the ceriatone chassis.

the differences i want are single input, and no holes for rectifiers or cap cans. attached is my working drawing but i want to make sure i size the transformer and choke openings correctly

also, what choke would you recommend?