I have GB Brand Bars in 44", 60", and 72", I recently got the 72", and haven't had mounted on a saw yet, but I wouldn't consider the GB bars to be Floppy. The GB bars are made in Australia,
@BobL is a Milling Guru, and he is in Oz, maybe he will have some comments about GB Bars
I'm Pretty sure that the Huskvarna branded bars up to 36" are produced by Oregon, and the Husqvarna bars from 44" on up are the GB Titanium alloy bars.
Unfortunately, the prices have gone up, but Alamia, in Denver had some Excellent prices on the GB long bars, it's been a couple years, but as I recall, the 44" was $210 Shipped, the 50" was $235 shipped, and the 60" was $300 shipped. I,m Really Regretting not ordering a 50" back then, as they seem to be NLA in the US any more. 2 or 3 weeks before I decided to order a 50", there were 3 different vendors showing them in stock, then when I went to order one NOBODY had any, or could get any.
I was able to contact GB directly, and they still had them, around mid February when all the China Virus issues were beginning, my jaw hit the floor when he quoted over $500 shipped to the US
, then I checked the exchange rate, he had quoted me in Aus $, it worked out to about $375 shipped. Then my Wife, who is a Hairstylist, was ordered to close her Salon, so I have held off on ordering one, but still plan on checking with GB again, when things settle out a bit.
I'm Pretty sure it was BobL, that had a swing up magnet that supported the middle of long bars, until he got the cut started, then the wood supports the bar, and sag isn't a problem.
Doug