Right I've got a Fixed/free hub on my bike I've just taken of the Freewheel to discover that it's not got a LH lockring hidden underneath, so I can only safety fot fixed cogs on one side.
I'm very keen on setting the rear wheel up fixed/fixed so I can have a lower commuting ratio and a higher track gear and I only need to flip the wheel not faff with swapping sprockets or stripping lockring threads.
I'm really not keen on either side being a "suicide gear" I've had a look about on the interweb and although people seem to have discussed the idea a bit I don't think anyone has ever really bothered to try and convert a fixed/free hub to a fixed/fixed? especially using a method that allows you not to have to disassemble the hub from the wheel?
I can think of a way of doing it, but it would require a bit of tooling design, and I'd need to source a LH 1.29" x 24tpi die...