Bogen CHB-20A Rebuild

[physics]

Already, did the first bit of "real" work on the amp in a while. I replaced the screws holding down the power transformer with some longer ones so that I can build a power supply circuit card on them like in TUT5's LP Standard project.

   

This particular transformer is a lay-down unit however, unlike in the TUT5 project. Is there any issue with resting the circuit card directly against the transformer bell, given that there are no eyelets that get shorted this way? I'm concerned about whether space for airflow under the board is required to keep the transformer happy. Additionally, if I do place eyelets over the transformer bell, how much vertical space should I have between the eyelets and the bell for good electrical insulation? The chassis isn't that tall, and I was planning to put electrolytic caps on this board, so I'm playing a balancing act between having the caps touch the bottom of the chassis and eyelets shorting against the bell.

Any input is appreciated.

Thanks,
         physics

P.S. I know the safety ground needs improving, I got the amp that way and until I replaced the bolts I didn't realize how bad the connection was. I'll be drilling a new hole dedicated just to the safety ground and replacing the termination of the wire with a locking solder lug, possibly topping things off with a nylock nut.