Several things............ First loose the lightning holes your not going to to save that much weight and also laser cutting goes by inches cut usually.. that is alot of cutting... get a good foam source , I use the same foam that Carden aircraft uses .76 virgin pound foam... Contest grade would is also key and as we do here in the shop when the wood arrives we sit down and weight it all... we don't go over board with glue either.. We are working on 3 electric version Deceptions right now and should be well under 7 pounds.
As far as the Duck rule, you changed it to the point it does look like a Deception.... In SPA the most changes are a stretch of the fuse or widening it a bit to hold a OS 91 4-stroke.
I have done wings for Rusty Dose and we did put in retracts so he can fly both BPA or SPA by leaving them down...
http://www.rcuniverse.com/forum/m_7888157/tm.htm
Anyhow, the PMA Deception planes are done from the Original deception plans and a new canopy plug and mold where made... See
http://www.rcfoamy.com/page5.html
Our new CAD drawings about done and will be offering another version of a kit shortly...
As a side note we also have the Peppermint Pattie II and the 40 size PP also...
Scott
Performance Model Aviation
www.rcfoamy.com