'I agree the engineers working for Toro are doing a descent job with the lawnboy line. I think they have come along way these last couple of years. I think some of the lawnboy models are nicer than their own Toro's.' This is my feeling, too. The new models look better to me than anything painted red. My thing is, I liked the Honda GCV I had on a HRB216TDA. I only got rid of it because that deck would only cut up to 3" which is too short here in the summer. I also like aluminum decks. I also have had a LB 10684 for a year and really like that, so it's a natural for me to like the same mower design in aluminum deck and GCV engine. If I had won a contest with the prize of being able to spec out the ideal LB mower, the 10795 would be it - at least it would seem to be, but I'll find out. In case anyone is curious as to WHY I like the GCV, here's what I think about it: I used it about a year and a half, and was completely satisfied with it's performance in every aspect. Everything about the engine spoke of quality. Even though it's only rated at 5.5 HP, it pushed the heavy HRB216 around handily, even when going uphill while driving and mulching. The engine is noticably quieter and smoother than a typical L-head and makes a big difference in the quality of your time behind a mower. Of course, I still have reservations about the timing belt in the long run, like many others, but am willing to take a chance on another one.

The number one (common issue) would be pulley alignment. The second (common issue) would be belt tension. The third (common issue) would be smooth even belt motion. Verify all three are corrected, as one or more are causing the issue, and it should be fine. Back in the day before rider mower ownership, I rented a big zero turn mower and every time the deck was lowered enough to cut the grass, the belt jumped off. One pulley was supposed to slide up and down it's shaft to compensate for deck height adjustment and it had become stuck on it's shaft.

Swap them and try but if both decks are a similar shape they will mulch the same with Ninja blades.

No it is not a disc drive. There seems to be some drag on the tranny when you push or pull it when not engaged. Quite frequently the drive systems engages itself when pulling backwards for no known reason. Makes it difficult to mow with when you have to fight it taking off into obstacles.