Thanks. Its too late over here for me to contemplate the small screws so its just component pics for now :
View attachment 131701
View attachment 131702
View attachment 131703
I want to shrink-wrap those pins sticking out the bottom of the tube socket so unless you see obvious solder points on the PCB I think I'll run the cap between 2 of the pins.
Note: The CM5 has the Dave Thomas circuit mods and is essentially a first edition Advanced Audio CM12 (but with the stock 10:5/1 transformer). I have seen various HST11A boards over the years (this is a Shuaiyin SYT1100) but I just refer to that series as an APEX 460 as that's the brand-model most known.