Mower in question, 85 Toro 117 Groundsmaster with 90s 52" deck from a 120 (same machine, changed very little over the years). Like on the walk behinds, they use the support pins for height. The right front corner has the pin about 1-1/2" higher than the other 3 to level it. I have leveled the blades using the JD leveler tool (which I recommend highly for $8.00). The front and right corner of the deck is up. I plan on doing some major re-inforcing of the deck after I get it straigt. Any other ideas?