mod chip question

[sublime90]

allright heres some back story, i have 2 ps2's a v4 and v5. my v5 has a messiah 2 in it and the laser died and i sent it for repairs 2 months ago and they guy keeps stiffing me sayin hes gonna mail it etc, basically hes jackin my ps2. now im instrested in modding my v4, to my knowledge there isnt a no solder chip that doesnt require swap magic right? if theres not i was thinking of installing a duo 3 GT, anyone think thats a good chip? i dont want to spend alot of money modding this one (the duo 3 chip is like $28) i dotn want to spend 50 bucks, thanks for any feedback