First time buying an extender, need help.

So I’ve been thinking about purchasing a penis extender for a while now. The problem is, I don’t know which extender to go with and what routine I should use.

I would like to mention that I live in Australia, so it would be preferable if the extender has stock here for easier/cheaper purchase of said extender + replacement parts, if necessary.

What recommendations do you guys have?

I bought the SizeGenetics, but could not figure out how to get it on. Im a very average size, just could not figure it out. I currently use the Phallosan Forte, its comfortable, convenient and easy to use: however saying that I’m on my 350th hour and see no gains as of yet. Maybe flaccid, but now that its summer that could be playing the part. It’s said gains are around 0.5cm - 1cm at the 1000 hour or the 6th month mark. If you hold out buying one for 3 months, ill tell you if i have any permanent erect gains from using the PF. I keep a log, I wear it right and I’ve done a hell of a lot of research into it, so maybe this information will be useful to you