Matt, that sure is a beautiful Sui Eight!
Wish I owned one as well (maybe some day). On a sad note my Realistic STA-2100D took a nose dive the other day. I heard a loud snap, crackle and pop and turned it off immediately but it wasn't soon enough. I haven't had a chance to open her up but it will definitely be repaired in short order.
All the more reason to learn electronics and purchase the tools to repair this stuff.
When you play with unrestored vintage gear you are playing with ticking bombs! Gotta be prepared for them to go off.