I have a harbor freight carbide tool grinder. I have been thru all the mods to fix the tables and true up the back plates so now the grinder runs and adjusts just fine. (Thank you Utube). The next issue to address is the wheels. This grinder will be used for HSS tool bits for my lathes and for fly cutter bits for my mills. I have a separate grinder with green wheels for carbide. I have been thru several catalogs and web sites and the selection is mind boggling. I am curious as to what you have used and recommend as replacement wheels on the HF grinder to cut HSS with.