I have a RMT Beep diesel purchased from eBay in great condition. After reading about these little engines it sounds like they should be relatively hassle free and can pull a good load. Since I started running it my Beep has been having traction problems. I’ve also noticed that the problem is worse on tighter O31 or less curves. On the advice of other knowledgeable forum members I added weight which has helped. It can now run with 3-4 cars in tow but any more just keeps it in place with wheel spinning.
Any ideas on the problem or advice on how to further improve performance?