ProCo RAT ハンドメイド。Proco Rat diy project Classic 1986 rat schematic with added。Proco Rat diy project Classic 1986 rat schematic with added。Marketplace find: proco rat big box reissue : r/guitarpedals。オペアンプにNational Semiconductor製LM308使用ハンドメイドエフェクターにご理解頂ける方