Oakleaf -- the glueless patches are fine. Frankly, when possible, we fix flats with "virgin" tubes and patch the punctured tubes at home, then put them in seatbags as spares. I have used glueless-patched spares for months with no problems, and I have also used glueless patches on the road (when I didn't have a spare tube) with no problems. I inflate my tires to 120 before every ride (on road bike -- on my commuter with cx tires I go for weeks without inflating!!!), so they can certainly handle high pressure just fine, I think...