Thank you TC Electronics Customer Support.
After reading threads of losing knobs on TC Electronics RH450 and RH750 amps, I thought I would never have the problem since I don't gig because I'm still new. TB'ers told me how good their customer service is so I emailed them. 3 hours later I get an email from them saying "your knobs have been shipped." I know this is a meaningless thread but I just wanted to thank TC and the TB'ers. That's good customer service, no charge, no hassles, no worries.
Gotta love that!
Stringray club #398, Fender Jazz Club #365, Cort GB5, Sandberg VM-5, TCE RH750, RS-212