Marvin
The best way to use a "Large" E-Z-JUST handle is with a 4 inch bellcrank. The line spacing ratio is about the same as a regular Hot Rock handle and a 3 inch bellcrank.
See, they were just way ahead of their time.
I will post more handle pictures when I get the time.
Clancy
A really great look down HANDLES N HOT-ROCK HISTORY...
One handle that I had used with great success...was a gift from Bob Hunt with his hi-density-black foamish looking' black adjustable handle with the lock n' adjustable knob on the bottom that could allow one to adjust the lines during flight! The longer "arms" on the handle great advantage was way it appeared to really smooth out those level-laps...however they seemed to give me some strange lookin' and rather alarming squares.
After a few months of flying I noted that a small stress crack was forming just above that beautifully turned fitting that the up line slid through.....so I had little choice to take a zona saw and carefully cut both control arm legs on the handle shorter and re-expoxied them back into the handle again.
This seemed to give back that old muscle memory thag again and that handle served me so well for a very long time.
(BAD END TO STORY!!!!) My son and I went out flying just before a thunderstorm...started dumping rain on our old flying site at Aerospace parking lot. We quickly wrapped up things, and headed home.
The next morning before work...I thought I would open my tool box and dry out the contents!
GADS! I HAD LEFT BOB HUNTS BEAUTIFUL GIFT HANDLE and my .015 68'ft. lines laying on the parking lot!
I made a quick B line to the back parking lot that same morning...not only late to work at the windtunnel....THAT BEAUTIFUL HANDLE AND MY BRAND NEW SET OF 68 LINES WERE NO LONGER BY THAT LIGHT POLE..and the lot was filled with cars.
I spent half the morning...checking with security...posting a reward note on that light pole...and at the time clocks.
SADLY....I NEVER SAW THAT HANDLE AGAIN...and had to go buy and refit new lines and worse yet...had to resort going back to using my old modified 3" hot rock with the modified opened spacing (thanks to Al Rabe, who showed me a great way to extend the life of a hot-rock.)
It may be my imagination..but I think the later "Grey Hot rock handles were made out of a harder and longer lasting plastic material...that resisted the "oval-sawing" however the end the sawing effect of the Hot Rock main cables quite well.
Who gives a ripp...now that only a few of the ol fart die hards who hord'd a bunch of those old handles before they disappeared in the trashbins forever.

Again...Thanks for posting all those handles for a look back down memory lane.