Hi, this is Doug. My 88 vert needs a recharge - it's cold but doesn't come on all the time (possible relay problem). But when it it on - I haven't run it long - there are bubbles in the sight glass. I'm assuming it's the original R12 but not sure. Does anyone know a place I can take it where I won't get raked over the coals? I live in St. Clair Shores? Thanks..........