Yeah those numbers look good, the SG might be a touch low but with the PH at 3.5 I'd think they are ripe (I'm in the first year of picking marquette as well so not an expert). I'm surprised they were not darker, this is what our looked like with a SG of 1.094 and a PH of 3.00 (I probably should have waited but the wasps were doing damage).Ah okay. I am pretty sure a few of the seeds got crushed. We'll see how it turns out! This is my first time ever trying to make wine from grapes, so I'm sure there will be a lot of lessons to be learned. PH was about 3.5 when I checked, and SG 1.090...So those numbers look alright, but we'll see how the colour, aroma, tannin etc. turns out. None of the grapes were really dark purple. They were all sort of light purple in colour. It's going to be getting close to the freezing mark here very soon, so I figured I should harvest now if I'm going to get anything at all. Based on the sugar/acidity levels, they are fairly close to proper ripeness anyway I think.