[BP-Revo]

I would use a needle. It seems better to me. The hole is small enough to be resealed with CA.

I just don't think the slit is a good idea because it is just asking to tear.

I'm going to do this on my next set of tires (don't want to do it on current G2R set because they aren't belted). However, I'm going to heat up a needle until its a good temperature, then use it to puncture holes in the tire. The hot temp should partially melt the tire and help keep the hole strong (no tearing).