[Formulajones]

Haven't heard of spelab.

I have used dmh, quick time, and jegs version as a cheaper alternative. Biggest differences I've found are the motors used, the construction of the door and how well it seals, and the switch used.

Some switches are bigger and bulkier.

My favorite to date is the dmh. I've had some of Dave's stuff in use for 22 years and still working great. Excellent seal and the motors are still going. Rocker switch is nice and compact, easy to mount and/or hide. Drawback is

QuickTime is a close second. Good seal, have had them working on a couple other cars for 10-12 years. Switch is a bulky toggle that's kind of difficult to hide.

Jegs have doors that don't seal as well but eventually sealed after some carbon build up. Somewhat of a cheaper design hence the lower cost. Nice rocker switch, small and easy to conceal.