[11douglash]

Safe, yes. Legal, no.

I've seen Victor 884's support waay over 100 Amps (300, to be exact) for short periods of time. For Large periods of time, such current loads tend to be damanging (molten wires, ect)

Now, that being said, as long as you arn't doing crazy loading, the window motors probably are pulling only 4-5 amps combined. Even a cim only draws 2 amps freeload. A victor can handle 10-20 amps all day long without too many difficulties.

Mechanically speaking, even if the motors run at slightly diffrent speeds at the same voltage/amperage, it'll be fine. My team hooked 2 windows together to make a winch for 2011 build... and it was very reliable. and powerful.