Time limit to edit the comment expired so I'll post it here:
Hi there. So I fitted mine to my 172 yesterday.
The parcel arrived on Friday and apart from the mount I got a little riddle when I've seen the "Dolphin Friendly" logo showing through the tape. My girlfriend bet on some sort of fishing equipment I simply had no clue. Turned out to be a box of cat-food. My cat approved of this straight away.
Cheers for putting in the efort of putting my nick on the mount. Absolutely love it. Back in a day when I worked at MINI Plant Oxford in the Engineering department i was responsible for managing all the rapid prototyping jobs from engineers, so I appreciate this took an extra few minutes to do.
My exhaust was dropping down so I knew the mount will be in sorry state, but what I've seen kinda shocked me. I've unbolted the mount, which was quicker than expected as one of the bolts was snapped by previous owner
Then I proceeded to cut out the old insert which was an absolute b**ch to do. In the end I've gotten nearly all of the rubber out all the way to the mettal using 3 different knives, a small hacksaw and small, pointy pliers. I guess it could be handy if with the mounts you could provide the instructions of how best to tackle this job when you start the proper sales as it can be frustrating.
I lubed up the outside of the insert and inside of the bracket with fairy liquid, and was able to insert the mount quite easily by hand. Now this could be down to the way I cut out the rubber. Basically there is a small step in the metal at the narrower end of the mount on three sides of the box section (sides and bottom, not top). If I cut the rubber out flush with this step i think the fit would be perfect, with me getting rid of all the rubber, the fit is perfect but the metal doesn't grab it too hard. Once fitted to the car I moved the mount to align the bolts, and instead of the insert moving on the exhaust rod, the bracket was sliding on the insert.
My recommendation would be to make the mount 0.5-1mm wider and taller or make sure that rubber of the old mount is cut out flush with the step (although I find the step useful for holding the mount in place.
Then I also swapped out the old black center-section mount as mine was stretched beyond what seemed reasonable and the whole thing was just flopping about. I replaced it with the new style red mount which I have also wrapped with 2 thick cable ties to give it a bit more strength.
I then proceeded to change the downpipe to cat spring-s as one of mine is loose and rattles like hell at 3.5-4.5k revs. I didn't even get to start, because instead I learned why lifting an MK 2 clio front using 2 scisor jacks is a stupid Idea. Thank God I wasn't underneath the car when the whole thing collapsed, because otherwise I wouldn't be writing this.
This morning with my neighbour's hand I managed to get the Honda Jack from underneath the car. I'll report back when I do a test-drive and provide more pictures. The exhaust sits nice and high now.
Thanks very much Philip!