You might recall I posted a while ago a barlowed shot of M83 on an ED80 that had a bit of flexure. Since then I have been working towards modifying my imaging rig to barlow my 5" newtonian. Here's two test shots I did from my backyard. Last night transparency wasn't that hot but seeing must have been good. Better than my tracking anyway
Shots show potential. 1h on M8 and 2h on M16 up close.
I also attached a pic of my rig. The mods consist of a T6 Alumium plate (13mm) bolted on the Losmandy doveplate, a 12mm angle plastic bracket to hold the GSO extension tubes and 100mm steel counter-weight discs cut to size to balance the other side from 1kg to 1.6kg in 50/100g increments. Image scale jumps from 2.5 arcsec/pixel to around 1.2arcsec/pixel.