Having experienced an elevator trim cable break on take off , T tail Lance, it reared up like a shot duck, I pushed the stick forward and reduced the power so it could be held level ok. On inspection, once back on the ground, incorrect rigging in the electric drive unit had caused the cable to rub on itself. Under the break area was a little rats nest of bits of cable strands. Obviously never been looked at being under the rear plastic bulkhead. Just first flight after a 100 hrly.!