The glue of the Freewheel patch kit dries within seconds, seriously.

I can send you a kit free of charge and you can try for yourself. I guess I could also take a little video of the whole thing with the clock running and you could do the same. Both wheels to be pricked by a needle once - best combined (front and rear) time wins. PM if interested.

I have replaced tubes and patched plenty of times - patch wins every time. Especially on the rear wheel. No need to mess up perfect tension.