Rim tape

The one time I had a problem with Veloplugs was using a tyre substantially wider than the rim + relatively low pressure, which is pretty much a definition of XC equipment.

Had considered this TBH.
I'm planning on running 2.55 tyres on 28mm wide rims at about 30 psi. I've test mounted the tyres without inners, and while them seem pretty tight, there is a definitly room for the bead to move up and down. I going to have to start these wheels off carefully for a few reasons...:S

Personally, I wouldn't touch any of the 'fake-tubeless' solutions with a ten foot pole. For me, it has to the real thing - Mavic Fore-drilled UST rims - and then there is no tape required.

Agree, that if you're in the process of building wheels, with a side thought of trying tubeless at some point, it seems silly to us standard rims.I just did'nt see any tubeless specific 29er rims that I liked.