Good evening, all.

I'm looking for information on MKT's roster numbering for their heavyweight cars. Specifically, their number series of 12-1 sleeping cars. I've checked between the three reference books I own and searched online, to no avail. Is there anyone here that might be able to shed some light on their roster numbering system?

Thank you in advance!

Occasionally I splurge and spend what I call high end prices on rolling stock- $35 to $50 a car, however I mostly stay within the $25 to $35 range when purchasing rolling stock due to budget etc., Now I know the old saying is you get what you pay for, I have purchased Walther's "mainline" 50ft box cars $24,  on a scale of 1 to 10 in roll ability I give them a 3 or 4 at best, on a slight grade and a small nudge they stop within the grade, that's great if my spur is on a grade but not so great when creating drag during operating.

I have 3 axle Walthers trucks on some passenger cars. The mid axle has no side ways movement, and as a consequence, the cars derail. Any solutions would be much appreciated. Thanks. foalma.