Yes, but the process required will depend on the vintage of the kit......
When the sliding canopy was first introduced for the RV-6A there was an optional windshield available that had a more shallow slope than the fwd portion of the full molded canopy did.
The later version of the full canopy had a wind screen portion shape that more closely mimicked the optional wind screen shape but I think it still differed slightly.
Currently the same canopy is shipped for an RV-6, 7, or 9 finish kit.
Any opinions expressed in this message are my own and not necessarily those of my employer.
RV-6A (aka "Junkyard Special ")