Thanks EyeDoc! The sliders are rated at about 100 lbs each. I've attached a pic of the control panel when not in use.
As for the aspect ratio (16:9), paigeoliver, since MAME and many other emulators have ratio control, it's not an issue (I've got MAME set up to play in 16:9 so the aspect ratio for all my games is accurate). There are quite a few games that take advantage of 16:9 too (Defender for example). Plus, a lot of PS2 and XBox games now have a setting for 16:9 so it's cool to use it when it's available in a game as an option. Otherwise, yes, I have played some games that do appear slightly stretched (not in MAME though) but the difference is negligible. I will say this however, having the extra room on the sides of the screen helps when you want to display bezels in MAME games without losing the size of the play area. Top and bottom bezels, well that's a different story.