Thanks Len! I appreciate your reply and the info you provided. I didn't see any specs or dimensions for the pins on the Walthers site but I'll try to talk with them tomorrow to see if they can provide any additional info as to whether they may work.
Z, can I ask why your prefer to stay with the plastic pins?
Jbrock27, For now, it's just a bit less hassle, I guess; simply replace the missing pins and get the cars rolling again.
ZT