20% more sounds a little high unless you were running really wet. More realistic is maybe 8-12% bump on average but still worth it. A washing machine motor with a pulley setup works fine just make sure you balance the load or it'll shake your garage apart.

Nah, length for length's sake gets old fast...

That "mini description" trick works because it gives the accounting software folks their checkbox without making it look like you're hiding something. I do the same thing now and it saves about half the follow-up emails.