I have a lot of experience mulching leaves with different mowers. I have mulched leaves EXCLUSIVELY since 1987, sometimes in areas with VERY heavy leaf accumulation. Mulching leaves isn't going to upset the balance of the soil. The leaves ARE the soil, in a different form. Just don't bring the mulch from one location to a completely different location, then I could imagine a soil Ph balance problem. I have found no one mower/setup can do everything effectively. A mulch kit works fine on dry leaves, but not when they are fairly wet. The best way to mulch in ANY conditions is to first use a mower with a mulching plate (sometimes a couple passes), then go over the area without a mulching plate to uniformly spread the mulch. This means carrying 2 mowers, one set up to mulch, the other to discharge. The only way around this is to use something like the Director from York, then you can easily switch back and forth from mulching to discharge. Unfortunately, this isn't available for many mowers (including my 48" Turf Tracer!). So, I want to fabricate a hinged mulch plate for my mower, something I'll have done before Spring.