Hello and welcome.
I recently did a BillD upgrade on my C-1 and it was a lot of work but does make a big difference. Buy lots of solder wick or a good desoldering tool. My suggestion is to buy a quality desoldering tool like the Hakko FR-301. You will thank me later....lol. I gave up with solder wick about 1/2 way through and bought the Hakko.
Do a search on this site for BillD and you'll find lots of info.
Carter