Thanks much to those with the useful advice, specifically the anti-scalp roller. I'll try to find one and add it to the mower to save the lawn.
The dealer I bought from has been in business over 50 years and has been selling Mahiindra for 12, it's a family operation with long-time roots in the area so I thought I had 'vetted' them properly. I also thought the fact that they had shopped around and found a better deal on accessories like the mower deck than just selling Mahindra was a good thing, but this is a learning process so I'll take it as an expensive lesson learned. I'll just start using the wheels like a mower is supposed to be used, and if I break off a wheel then it will probably be time for a new mower deck and I'll hopefully know a lot more about what I'm looking for by then. I don't know if the wilfe will like the expensive red lawn ornament though if that time comes.....