Hi, I am in receipt of a really nice Getzen Eterna II 700S from 2003. Per the seller it has not been played much, if at all, since new (and it shows ). What steps should I take, assuming it has perhaps sat in a case for 8 years or so? Should I disassemble and clean or just clean/lube valves? What to look for? Thank you! Looking forward to getting a few notes out of it soon!