I was just re reading the post and also verifying all the trims available for that housing.
After reading the comments, I was beginning to be inclined it had the tabs and it was not the expansion hold down clips in the way.
The housing is designed for 2 different styles, one being the lifting expanding style and then the torsion.
The tabs on the sides for the torsion springs to clip into and raise the trim is for those designed for the wet area location to provide the correct amount of surface pressure on the trim/gasket to prevent moisture.(215 trims are this style)
So, when using the lifting style spring trims which are wider trim inserts. you have to take a strong flat screwdriver or the sides of pliers, then bend those tabs towards the housing to get them out of the way enough for the trim to slide up past them and not catch them on the way down either.
Those are probably riveted on the Juno if I recall so there is no way to unscrew the holding bracket but to fold it over as much as possible.
Many times you can take pliers, open the up, and get them started folding before applying the pressure with the flat side.
Those tabs should easily fold over to allow the trim insert piece to get by.
It should only be a small amount of room needed.
Know it seems odd, but they make these things so universal today and many times there are changes that the end user must make for accommodating.
I suspect it is only a small amount of upward space that is needed? as they sell the larger insert trim to go with the 205 , to cover a little more diameter and also give more depth to the 205.
That ring alone might do the job with no modification, just need to measure how much the trim lacks making the seat against the ceiling.
The extra trim ring is the TR5-WH.
TR5 Trim Ring compatible with 203, 204, 205, 206, 207 trims
Let me know if any difficulties