P-7805u power adapter questions and comments

When I got my P7805u a few months back, I read about the Kensington refurb 120W adapter that can be used with this (model #38004). I got it and since then I've noticed that this adapter gets REALLY hot. Now, it has the short little cord so it can dangle off the wall (to apparently keep it cool) but still, even the stub end of the cord that goes into the adapter gets really hot and frankly I don't trust it much.

So, some quick questions:

First, what's the OEM model number of the adapter provided by Gateway? I don't have it where I'm at and need to research based on that. I don't recall if mine at home is the 2 or 3-prong version (US). BTI makes a model AC-19120103 that may or may not at least replace this, but I want to be sure.

Second, is anyone else seeing this amount of heating with this Kensington 120W adapter? I can see the brick being hot but the stub too? The part that goes into the wall is always cool, but the other end that goes into the brick gets almost as hot as the brick, and it's been very gently used.

Third, I notice one other unpleasant feature of the Kensington 120W adapter (besides the heat): if you plug it in to the wall one way, the metal parts of the laptop (such as the bezel around the keyboard) get "tingly", as in there's a 120v ripple current there (enough to notice but not enough to shock). Flip the plug and it's not there, suggesting an effect of the floating ground (you get this effect in "touch responsive" lamps and such as well which have non-polarized plugs). That's a little alarming. I have no other grounded items plugged into it, such as a printer or such, or I bet I'd get a nice ground loop going on.

I see some debate about other adapters... I'm really tempted to just get another OEM one to save the worry despite the extra size/mass. And I really am not trusting the Kensington very much at all now.