G 103 Twin II weight troubles...

The Twin II of our club has an empty weight of 415 kg wich, with a max.
permitable total mass of 580kg leaves a max. payload of only 165kg.........

Now we are trying to solve this problem because we want to ad an extra
20 kg of payload. so the payload can be increased to 185 kg

the options are to:
replace the big heavy mainwheel and tyre by new TOST or Beringer
lightweight aloy wheels
Grind down the very thick (GROB style) gelcoat to a minimum
Replace the battery for a LiPO type
Remove radio and electro sink-clim indicator incl all electrica wiring.
Remove all pollstry.

And then?????????

Someone recognises this problem and who encouterd a solution??

Eric