Hi Bruce,
I've been lurking and following your progress. Great work !!
You can get the Laser Engines here
http://www.proctor-enterprises.com/p...aser/laser.htm
They are great to work with and Lasers are very smooth. I have a 300v that lives down at CHIgnition currently as Adrian is exploring a gas conversion for me.
As far as the dimensions you can still get them from their old site which is still up while they update the new site. The new site went live this year and is still being filled out.
http://www.laserengines.co.uk/engines.htm#300
Click on the photos and the new page shows the dimensions you need.
Keep up the great work!!
Joe