slikest
The Challenger is tough. It'll last. The scales that come with the kit are adequate for the job. I have an RCBS also, and they're both right on the money. The auto prime shell holders are numbered. That number identifies with the calibers that fits it as per the instructions. In other words all major calibers will fit one of those eleven holders. You can make this set-up work as a portable station.
The Perfect Powder Measurer can be mounted on a block of wood or steel plate instead of securing it to a work-bench. The Challenger can be mounted to a thick piece of wood or ply-wood and then clamped to your coffee table, kitchen table, or card table, and easily stored away when not in use.
Edited: 4/6/08 Add Picture showing 'steel plate mounted powder measurer'.
As for the Hand Auto Primer, many Re-loaders prefer it, as they can feel the Primer as it seats into the shell.