nexus air modifications

[brians]

i use 2 nexus 200 on pond and have always been dissappointed with the airline and air distribution system
i have tried various combinations of 15mm pipe ,various size and spacing of holes and have found that the best system is to use 6 airstones using airstones, airtech 40 airpump is get excelllents movement on 100 litres k1

what modifications have other people made to the air supply on their nexus

Brians