Tweezers work, or hemostats are better. Once you finish a side you can just let it air cool and then tweezer up through the hole, tear off your blow tube and finish the hole on that side. Just do all your shaping first, so all that's left is that last bit and you should be ok. I've even finished one with my tungsten poker stuck through the hole, though that was what we like to call "interesting", if you follow me.
Fortune Cookie say, "When things go wrong, don't go with them!"
Current Glass-Melting Apparatus:
GTT Lynx powered by 2 5 LPM Oxycons and
a sexy Barracuda running pure tanked Oxy