Yea, we had problems with the original fusion generator plans due to scaling issues. The fusion generator's now have a scale marked on them! The Sentry droids do not as I think they didn't have that problem.
I build in Lego! Blogs at:
http://L3-G0.blogspot.com (or http://L3-G0.com for short)
http://MCK-Y.blogspot.com and
http://BB-8.blogspot.com
http://L3-G0.blogspot.com (or http://L3-G0.com for short)
http://MCK-Y.blogspot.com and
http://BB-8.blogspot.com