What's are the options when buying a X41 Tablet pen?????

[Smokestoomuch]

I finally got my X41-Tablet put together from parts and not having owned one of these before, the tablet pen purchase is confusing. I picked up somewhere that the Lenovo pen does not have an eraser, so you're better off getting an aftermarket pen... but which one? The Wacom pens have features like bluetooth, single mouse buttons and double mouse buttons. Could someone please point me toward the right direction? What's the pen to buy?

[rkawakami]

I know that this one works: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0284712891

Picked it up using the "Make an Offer" option (at a little bit more than 1/2 the BIN price). It appears to be a genuine IBM pen but as my X41t is the first tablet I've owned, that's not saying much . It does not have an eraser but does have a double-button rocker switch.

I'm still trying to figure out how this thing works (the actual technology contained within the pen and the screen)...