I would ask are you getting their latest and greatest in engine mods? We currently carry a lot of spare parts that I probably will never use, and i didnt buy enough of the stuff that I needed. Its not really a dollar amount its what amount of common failure parts to carry, to balance out what the lead times are.
Also, there is a big difference between Engine Spares and what you will carry for Auxiliary Spares.
We have already changed out a piston, and without that Engine spare that machine is down for at least three weeks.
If you are going to the Users Group we will gladly talk parts and issues we have with our inventory. Or call.