I bought the nokia md-11 booster speakers and fitted them to the GMT as Mbasko suggested. They work a treat, i can run on 4-5 gain and hear targets as if i was in gain of 7. The volume they put out with such a low threshold setting is amazing. The lower gain stops a lot of those hot rock effects and still gives good sensitivity to targets. You can really hear the chatter of the threshold better which was caused by EMI. If i tried to run over a gain of 4 on the weekend the chatter could be heard.Unfortunately no gold this trip, but i highly recommend these speakers. They cost $24.00 from OZ and free postage, a bargain i thought...roscoe