I was just reading a review on the LS20 by JS and I wanted to post a quote from there because I think it totally relates to this discussion. Keep in mind you can insert any custom light into this quote.
"Before closing, I'd like to say a few words of advice about buying high-end, expensive custom lights. Many people here, flashaholics though we all are, have never paid $400 or $500 for a flashlight, and consider the idea sheer insanity, or totally impractical, and that's fine. If $500 isn't in your budget, then it isn't in your budget. For some people, however, it is in their budget fiscally, but psychologically they have to go way out on a limb to "justify" it, and thus end up placing a great weight of high expectations on their expensive custom light. They end up losing perspective and stress out over any little defect in the finish of the light or the tint of the beam or what-not. This is no way to have a good high-end light experience! Take some advice from me on this one: if you have to go so far out on a limb to justify a LunaSol 20 or Ti-PD-S or other custom light, and will be disappointed with anything less than "perfection", then you'd best wait until you are in a better frame of mind before taking the plunge.
Ideally, you want to forget about the price altogether after you have paid it. You want to give the light a fair chance, a fair evaluation. I would suggest that you don't evaluate the light too quickly, nor only intellectually. Just use it. Rest assured that you can always sell it later if you decide against it, but for at least a couple weeks, just give it a chance and use it, and by "use" I do NOT mean to constantly compare it against your other lights and constantly shine it against a white wall to decide if it really is all that and a bag of chips. Rather, I mean use it for when you actually need a flashlight: EDC it, in other words. Let the experience and truth of the light unfold itself to you slowly and in its own way and time.
Specifically for the LunaSol 20, I would suggest that the PD action will probably exercise muscles which you've never had much call to work out before. It is going to take a little time for those muscles to develop, but it is TOTALLY WORTH IT. Invest the time and effort to do just a small amount of adapting to your new light. The PD action is awesome, one of my absolute favorite's, but it did take a week or two for me to get used to it and to build up a few appropriate hand muscles. For the first few days I found it a little strange and a little difficult to hold high constant on. That's probably normal, and if your experience is anything like mine, it will pass in short order, leaving you with a strong appreciation and preference for PD lights. Or, it's possible that you still might not like it, of course, and that's fine. It'd just be a shame to reject it in the first week because you found it difficult to activate. Also, I should mention that you can always substitute a weaker spring and/or cut the top loop or two off the existing spring, if you really decide a weaker spring-force is for you.
Over the long term, I would also suggest that you JUST USE YOUR LIGHT! Do NOT put it in a box or on a shelf because you are too afraid to use such an expensive light. A LunaSol 20 or Ti-PD-S or SunDrop shelf-queen is a terrible waste! Don't let these wonderful lights suffer such a fate! I mean, if that's what you want then fine. No problem. But just don't let fear and trepidation and constant awareness of the cost of these lights keep you from using them. Do yourself a favor, and put them through their paces. Use 'em hard. That's when the LunaSol 20 will really shine."