I'm staying with a friend and they don't have much, the retainer step is far too small for a snap gauge even if they had one. I can get calipers in there just barely but I'd prefer to use a height mic. Gonna see if the comp one works, will let you know. If the beehive retainers fit a bit deeper that will be a bonus IMO there's not much room, if the new one doesn't clear the step I was going to find a local machine shop and borrow some valve spring shims to space the height mic above the step.