  With construction halfway complete, IceCube is already the most sensitive
neutrino telescope ever built. A rearrangement of the final holes of IceCube
with increased spacing has been discussed recently to optimize the high energy
sensitivity of the detector. Extending this baseline with radio and acoustic
instrumentation in the same holes could further improve the high energy
response. The goal would be both to detect events and to act as a pathfinder
for hybrid detection, towards a possible larger hybrid array. Simulation
results for such an array are presented here.
