Firstly sand down all joints and lightly score and prick so that the glues has something to grip onto. Re glues, have a look at this HK thread http://www.hobbyking.com/hobbyking/f...KW=glue%2C+epo
. I used HK own foam glue on my HK Parkjet http://www.hobbyking.com/hobbyking/s...rge_100ml.html
and worked really well. It's similar to UHU Por. You might be able to use Evo-stik timebond or their contact adhesive but test a small area to ensure your model doesn't vanish in front of your eyes.
Multiplex suggest their own Zacki Elapor Glue for their models. It's a non-foam safe CA glue and certainly held the nose cone on my powered Blizzard. Some say just use medium CA with kicker and others consider CA to be too brittle