Come on ... if you are really worried about weight then let's:

i. remove the pilot and instrument panel decal (btw, I am curious, are pilots a must for events?)
ii. lighten then US by drilling some holes
iii. lighten firewall a little (you can go EP to ensure less vibration)

Hehehehee ... I think there is an EP version of the Altair in Singapore now. I need to ask my pal. I heard he wanted to go EP and that the plane is completed. Wonder if he went the EP path ...