Tony,
there is NOTHING wrong with doing exactly what you have done.
I have done the 'tape' job many times so that I can prove a concept
without wasting unecessary money and time on something that
might end up a dismal failure.
Things like...buying an adaptor to find you can't reach focus
Buying an adaptor to find you have terrible vignetting, coma etc
If it is a success then you know exactly the dimensions of the
adaptor you need and you can do some homework to source one.
Well done.
Steve
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