dont know pj- not even thought about that yet lol...
did some work on 540... it originaly weighed 14.2kg... put it on a diet... now its 13.600kg bang on lol;
cut a titanium lid and mounted it;
http://i685.photobucket.com/albums/v...s/b9b2b542.jpg
http://i685.photobucket.com/albums/v...s/e8a2e429.jpg
milled a pocket in the base;
http://i685.photobucket.com/albums/v...s/a02d3cb9.jpg
shame ive got no weight for paint :(