To enable the canopy to sit in the fully open position it was necessary to secure it via brass pins (to give strength and an accurate fit). In addition to hold the rear of the canopy off the fuselage as it slides back it’s necessary to add a taller extension to the guide rail. You can see that it took some trial and error to get the locating pin holes in the right place. Not to worry, these “extras” will be covered by the canopy itself.
Here is a better shot of the guide rail extension. The back of the kit canopy will rest on this extension to keep it at the correct height.
The 12thou brass pins have been added to the bottom of the canopy frame. These will slot into the locating holes on the canopy sills
Here is the finished result. You can see how the canopy frame now slides over the top of the heat exchanger intakes. Without this fairly simple modification, the canopy slides open less than half this distance before it hits the intakes. When sanding the seams around the front of the Lex, the fillets under the intakes where destroyed; here I have replaced them with 5thou card.
A similar result on the starboard side. Note the detailing added to the canopy frame.