I've been using a booster of sorts ever since I've used telescopic sights. Reason is that i shoot right handed but my left eye is dominant.

My boosters are just camera close-up lens/es in a home made eyepiece adaptor. It takes a but of faffing around to get the best distance from the eyepiece but it does give me a much clearer view and reticle image.

The downside is that there is now virtually no eye relief although thats not much of a problem on a PCP.

Like this ....




Colin.