You could try asking in a suitable place, such as the DCC Questions forum.

Nick

Sorry about that, but its my first time asking for assistance. Thanks for the suggestion.

Ron

A trick I got from the club members is to get a blob of bluetak and put this in the planned position of the decoder. Replace the body on the chassis which will squash it down. Then when you remove the body again you will see how much space you have. If not enough you can either try and modify the chassis or body to create the space you need, or try another position

Philbax