I did something similar, apparently put too much tension when I tightened. About a week later the top cracked in half..
Thanks for all the info in the posts, this is a old thread but still useful.
I took a different approach with repairing I thought I could share.
For the bottom cover, all 3 mounts were broken.
I used so 3/8 copper pipe and brazed on a washer on one end, braised the other end closed and drilled a hole for the bolt (got longer m5 bolts with same thread from ACE hardware shown)
Made 3 of these the correct lengths to match the original mounts heights.
View attachment 2109217
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Only 1 top cover mount was broken, so made a long threaded 8-32 rod brazed into a similar post and a spacing 3/8 copper pipe.
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That is how it looks, put it on and it seems solid and holding well..
View attachment 2109221
Should be good for a while.
Thanks for letting me know, I will check and make sure I have not made that too tight.
There was already a crack in the top that I used expiry on the inside to fix, so good chance it may crack again. I can be hopeful.. will see.