Quote:
Originally Posted by Burdekin
£1 coins fit but need thinning to be flush. Some JB weld to hold in place. You can then make some plates to fix over them and screw into the head.
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Isn't it unlawful to deface, destroy or otherwise repurpose coin of the realm in GB. It is in Canada - if they catch you.
Notwithstanding legalities around defacing legal tender, I believe that there are small (7/8 " I think) casting plugs / freeze plugs that will fit nicely in the injector port to seal it off. A bit fiddly trying to tap such a small plug with a ball peen hammer so best to back up the fit it with something like some Loctite sleeve mounting compound. If you are paranoid you can tap the port and use a flush (allen key type) NPT pipe plug to seal off the port. However, big NPT pipe taps are a little pricey if you can't borrow one. The pipe plug has the hugely important advantage that it looks professional - like it is supposed to be there as opposed to something cobbled up.