Thanks!
As there is various discussion of fitting Lionel scale pilots, I thought I’d show the achievable clearances, and a direct comparison with the unit that came with my loco.
First, clearance achieved on O36 track
Here’s the pilot that came in the box. Looking at some other pictures, I could probably have got it in at the expense of reduced front clearance
Here’s a view of the overhangs on O36 track... I definitely think this loco belongs on O42 or bigger!
So, it’s a definite improvement and IMHO, a reasonable compromise on possible curves. I’ve got a stock of O42 and O54 track now, and some O42 radius switches; I’ve just bought a folding ping pong table on eBay so room for a simple layout using those sizes.