This idea (basically a good one) does get a bit complicated. For example, I assume Matt (or whoever) would 'approve' the hull of my boat, but I would certainly not expect Swallow Boats (SORRY - genuine slip of the pen: this is going to take some getting used to!!), I mean Swallow Yachts, to associate themselves with my rig: which is the bit of the boat which would wear any emblem assigned to me.
And I must say that measurement fees smack of a competitive class association, which I don't think we are - yet!?
What about a burgee which is absolutely limited to us home builders, and would therefore exclude all the had-it-built-for-me riffraff? I would fly one with pride. (It might also divert me from mischief-making such as flying a white ensign and seeing how long it takes for the RN and/or RYS to react. Would that be a criminal offence, or just cheeky?)