Boarderguy
Chief Narctopus Wrangler
Unless you’re into vintage scuba and know what you’re looking for, buy new or verifiably LIGHTLY used gear.
Extrapolated from the above, anything not newish is trash and should not be pursued. This because you bought an older item that wasn't supported by the single source you went to. WA, specially the South Sound, has a lot of shops capable up repair for these and even more individuals that can do it when the shops fail.Buying secondhand regs is risky.
Congratulations on making it work. Most people either don’t know what to look for, or do not wish to waste time pushing their luck looking for bargains on CL that won’t fail on them as soon as they jump into the water.
The SP109 is Frankensteined together with G250 guts and a few other bits.