I'm sure this is?could turn out to be a very silly question, BUT.......

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Some time ago?I bought a 2901 that was?quite grubby and?removed the top and bottom cover "twist to lock" fixings in order to clean?beneath them.

So far so good, and all cleaned up nicely, but I've yet to find a way of getting them back again that isn't likely to cause damage to the covers!

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The fitting method is simple enough in principle, the locking "lever" drops over a slotted shaped end to the locking "screw" and then slides into place to hold the whole thing together against the tension of?a dished serrated?compression washer?that sits under the countersunk "screw head", but there's so little give in those compression washers that any attempts so far have risked putting sufficient?pressure on the quite thin aluminium covers to damage them.

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This is a similar sort of arrangement to the cover fixings on the old 500 series scopes etc but I recall those as being bigger and never causing this sort of aggravation. I'm sure there must have been other small TEK cases with these fasteners, and there has?to be a quick and safe way of fitting them, but I'm wondering now if there was some kind of shaped tool that compressed the fitting from either side without putting pressure on the surrounding metalwork.

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Any thoughts would be much appreciated.

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As an aside, for anyone who might be interested, I found some nice internal photos of the 2901 here....

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Regards

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Nigel

GM8PZR