Changing trucks on N scale rolling stock?

[pcarrell]

Thats most probably just a press in pin.  You can remove the wheels from the truck (to give you some room to work) and then just pinch the head of the pin between your fingernails and pull it out.  Many of the Micro Trains packs come with new pins in the pack too.

[Bill54]

I've been in HO scale for a while and am changing to N scale.  Being new to N I have a lot to learn.  I've made a few purchases on Ebay and picked up some rolling stock with rapido couplers.  I want to change them to Micro Trains type.  The rolling stock has couplers attached to trucks so I'm going to have to change the trucks. 

My question is: how do you take the trucks off the cars?  They seem to have a button looking object with a small hole in the middle.  Does this need to be drilled out and tapped for a new screw?  Or am I overlooking something?

Any help will be geatly appreciated.

Thanks,

Bill