BTW can I have your opinions on the dilemma I face. I want to make TFA Rey lightsaber and I have an immaculate Icons Skywalker saber ( with perfect case but no paperwork) that I have had for 20 years to convert Do I use it to make a conversion or do I keep it and try and find another. Values of Graflex's (real or otherwise) seem to have gone through the roof but was not sure about the Icons version because of its inaccuracies. I think the TFA is a great version of Skywalkers saber but am torn as I am sentimental about my Icons.
Honestly the ICONS Graflex Luke lightsaber was the best replica ICONS made because it was pretty much a spot-on (non-working) replica of a Graflex flash. Much more accurate then their Heiland-based Vader or 'best guess' Obi-Wan lightsabers.
Back in 1997-2002 these were in crazy high demand and fetched a good price. With the advent of ebay and other on-line sources for buying a real Graflex plus the several other good replica Graflex's over the years (Parks being the most popular) the ICONS Luke saber is not in high demand anymore.
As a replica of the ANH saber, it's not accurate as it only has 6 grips instead of the ANH 7 grips, and although the d-ring in the correct style for ANH the 2 hole, 2 screw clip is inaccurate. If you wanted an accurate Luke ANH saber, the ICONS is passing but not 100% accurate.
Due to the inaccuracies and the low demand, if you tried to sell it you would not get much more than other replica Graflex's are going for these days.
Because the ICONS as a Graflex is already very accurate, and you can replace the ANH 6 grips with the TFA 6 grips, add a Kobold d-ring, and replace the bubble strip with an TFA circuit card and now you've got a 99% accurate replica to the Luke/Rey/Finn lightsaber from TFA I say go ahead with the conversion. To add the missing 1% you would only need to add the clamp cover even though the ICONS does not have the Graflex stamping for the accurate wrapped-clamp look.
I say convert the ICONS to the TFA. Or at least convert it to a proper ESB. Either way you would be improving the inaccurate ANH version to something accurate.