What do the experts make of the "power cylinders"? Are they accurate to any of the ANH versions?
They are definitely not accurate to ANH, reading through this thread I seen that jnko has actually identified the origin of the power cylinders correctly. And just as he said it truly is kind of funny. Somewhat of an ironic coincidence actually; Andrew Ainsworth of Shepperton Design Studios who originally produced the vacuum formed stormtrooper armor in 1976 for the production of A New Hope on contract from Lucasfilm. Has since been in a huge legal battle with Lucasfilm over the production and public sale of his stormtrooper armor. His armor is not well received among circles of people "in the know" if you check out whitearmor.net you'll see what I mean. Anyways his blasters are known be very inaccurate casts and especially his power cylinders which seems to have originally been custom made using found parts, again VERY inaccurate to the originals seen on screen in A New Hope! The true origin of those ones has yet to be discovered and confirmed!
The prop department working on Rogue One seems to be using resin casts of the power cylinders from his Shepperton Design Studios E-11 Blaster which is kind of crazy coincidence that a cast of his imitation Star Wars prop has now ended up in an official Star Wars film, Lol how ironic! Considering he made the armor used on screen in the original film, and was almost sued for producing and publicly selling that armor.
ROGUE ONE E-11 most of troopers in the movie used resin casts of these items as opposed to the real thing.
Airsoft S&T Sterling L2A1
Shepperton Design Studios power cylinders. (appears to be a resin cast)
M.H.R. Co. M38 Telescope from Sherman M4 Tank (1943 version with wide front foot)
Hengstler 400 Counter Module (with plastic socket cover box not metal, and no eagle window)
Element M300 Flashlight (with non-scalloped button guard)
Custom scope rail (higher than ANH, screwed down on both front & rear end)
T-track for covering the receiver tube holes. (Marv on whitearmor.net has good size T-track for the Airsoft Sterling)