I would say stay away, or keep it to a minimum. Other than 1 ab exercise per week, I dont do anything else to train my midsection, but when I diet down to contest condition, my whole midsection is crazy, which I figure has to be from the heavy squats and deads(been up to 550lbs for reps on deads) without a belt.
Carth, I would say ass to the floor is key, thats where I got my best leg development, and there is no cheating when it gets heavy as you know the feeling of your ass touching your ankles. Its also safer on the knees, as the stress shifts from your knees to your hips when you go that low, and the hips are a way stronger joint.
Tweakle bro, you're only an hour away, and squat around the same as me, we have to hook up and hit legs. Superqt, same goes for you, but i get to dictate what you wear though(or dont wear)
smaretick, that is an impressive weight, I'm squatting 100lbs more, but I outweigh you by 90lbs as well