Ok guys...here is scoop on 07 flap and subpanel(bent bracket) underneath.
I had a 07 and 06 rtx side by side at dealer...also had an attack....first off,the SUB brackets ARE DIFFERENT.....the part numbers ARE DIFFERENT,they get updated when you order them,so part numbers show same in microfiche.
now,the difference is very slight from 06 to 07 short track,the Attack does NOT even have a sub bracket....so the attack is a nON issue with new flap.
on the short tracks,you will see the 06 bracket has the BENDout half way down on the 3 HOLES ...while in the 07 bracket,the BEND out,is ABOVE those 3 holes....so the bendout is at a different height from 06 to 07....what this does is it makes the 07 flap stick out alot further,when put on an 06 bracket....
IMO....the 07 bracket is not needed....it is about 18 bucks,so not bad however it is alot of work to change out with several rivets....
I do feel if you simply change out flap with NO MOD to the bracket,your flap will be sticking out WAY TO FAR to hold any snow underneath,and your buddys will hate you.
the simplest way to add the 07 flap,and cheapest...is to keep 06 bracket,but BEND IT DOWNWARD,so when you attach the new flap,it is at a proper angle,and not sticking out too far....this is something that you can bend before riveting on flap,and holding the flap overtop to see where it will sit.
yamaha wanted the new flaps more rigid,and away from the track more,as many of the tunnel bending issues were from flaps gettiing caught by studs and drawn under.
in conclusion..YES the brackets ARE DIFFERENT,however,i dont feel the need to make the brackets swap,since a slight bend of 06 bracket will match the 07 easy enough....
hope this helps everyone who wants the 07 flap...if your adding a rear heat exchanger like me,this is an opportune time to do so...as you will be right there,where you need to be....
Dan