The GP PAPS v2.5 LUX is more than a Mod could be 
Having 'obtained' it in the 1st batch and since playing with it 24/7 (incidentally my Serial# is
0247), I find the GP-LUX miles ahead in concept and design. Both minimalist and simplistic (
Perseas says, "less is more"), however manufactured to the highest efficiencies and offers unbeatable performance.
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Lets' take the
TUBE. It is a fresh introduction... Aluminium-Bronze. Rock solid, tougher than brass and 4 x times expensive than SS. And man, it's a head turner. At hand it feels more like Gold, definitely dazzles like one! There'd be patina? Yes. But, much later than brass. And we have discussed re-shining it back a few post earlier in this thread already.
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The top
HEAD and bottom
SWITCH. Made of certified EU
316SS. Higher grade than the previous v2.1, which was 304SS. And they r polished finish (shiny). Together they offer contrasting hues to the device, the body being Golden!
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The
CONTACT POINTS. Telescopic head, obviously, who makes otherwise nowadays? But 24K Gold over Silver plated? Nah, not many! And this 24K Gold/Silver is all over -- the positive contact point, the bottom (negative) rest-nut and the telescopic post. This entire arrangement gives "conductivity" a new meaning. Though I may not be an efficient techie - yet my multimeter suggested a mere
0.1-0.15v voltage drop without load, while it's consistently <
0.2v with a 1.1-1.2Ω atty.
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The
FIRING BUTTON. It's pointless to talk about the GP-LUX without describing it's new designed, innovative button! Hereon all PAPS shall adorn this refreshed button until
Perseas comes up with something better. This is a rocker
! Yes the
LUX stands while being unlocked! GP created 4 ridges of 1mm height on the bottom of the locking ring, which enables the PAPS to stand upright without the need of being locked. And while talking of the advantages of this button design -- the PAPS firing button has even
lesser travel now. It performs at nearly '0' pressure... it's a mere 1mm plunger... and thus akin to touch button!
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The
LOCK RING. The design dept. of GP has another feather in their cap with this locking ring. The ring works super smoothly, locks/unlocks the switch just with a flick of the finger. Yes, one single flick rotates the ring into a full 360° turn, which is enough to do the job.
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The
THREADS. All threads of the LUX and it's switch mechanism are calibrated. It's at 0.05 tolerance. So, the new v2.5 switches will be interoperable with all earlier versions of the PAPS, especially the v2.1. However, the new tubes wouldn't, with an earlier switch. The grooves are the best machined in a device as of now. Everything couples-in buttery smooth, effortlessly.
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OVERALL: This is one stunning device, an MPM (Must-Possess-Mod)!
