Locline and the mentioned Chinese Flex arms (Intova, also sold by Fantasea and other dealers re-branded) work fine for small strobes like Inon S2000 and even Z240 / Z330 when underwater.
I used Locline for decades and the 3/4" segments work fine. I also used them with Ikelite DS51 strobes and even have some Ikelite customers using the Locline 3/4" arms with the larger DS160 / 161 strobes.
Above water I simply tilted both arms forward making the system like a tripod to set down and cross above the center to carry to boat or hotel room. The same technique for people with larger SLR or Mirrorless systems works or add one of those straps and clips to your heavier handles.
Yes, Flex arms of any type make noise when adjusting. I adjust strobe or video lighting angle FIRST then shoot or record. Any attempt to move video lighting DURING video will result in a jiggle etc. which is VERY distracting unless you'll edit it out later.
While generally cheaper and lighter I understand why people like ball joint arms and clamps. It feels solid above and below water.
But for my needs the last 4 years shooting a compact Canon G7X II camera in my Fantasea housing adding
anything heavier to my rig goes against anything I want or need. Why get a lightweight housing and camera the ADD weight to it underwater???
Additionally using ball joint / clamp arm set ups I see people adding MORE bulk in the form of STIX blocks or buoyancy tube arms to ADD positive buoyancy underwater.
Diving is complicated enough I don't need more complication when to enjoy a dive. The bigger and heavier you make your system will be more you have to push through the water. Not fun.....
I'm a "simple is best" person in diving and life so don't follow my insights unless you are too!! LOL......
Just one old guy's opinion (FY I'm 67, 50 years diving this year with thousands of dives over those decades traveling all over the world.
David Haas
Haas Photography Inc.
Stow OH USA
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