I'm thinking I need to keep the 135lb warmup and drop the 225 in between and jump straight to 315. I'm pretty sure 500 is just a mind fuck at the moment but I'm sure I could go for 425 for at least ONE set. We'll see. Small jumps. I won't sacrifice form for weight. Thanks for the props. I know you don't give them out often. What type of hybrid routine are you talking about?
Here's what I'd suggest:
135x1x10 (warmup)
225x1x5 (just to get in the groove)
315x1x5 (again, to get into the groove)
405x1x5
some doubles or triples in the mid to high 400s just to feel yourself out.
If your body is used to high rep sets for squats, it might take a bit to get used to "PLing" style, low rep sets at much higher weights. I'd take it easy the first couple of weeks as you work up to your max weight/set of 2 or 3. You're right in taking "small jumps," especially if your body is conditioned to "think" in terms of high reps.
By "hybrid" routine I just mean easing into less rep and higher weight sets over two or three weeks. Your body will tell you what's right, and whether you can go for the gold sooner rather than later. It's best to take it easy and go slower rather than risk injury.
Something I've done in the past is to use very low rep sets until I work up to a max single or double (though not a PLing max I'd do in a competition, just something I can get for a relatively easy 1RM). Then I do my work sets as drop sets, high rep style. After squatting a hair under 600 for one rep, 405 seems REALLY easy. Though of course you gotta be careful going heavy like this all the time...destroys the CNS. As with everything, you have to cycle and feel your body out, and let it be the guide.