Does anyone have any experience with hyper flexible babies?

Bit of background.

DS is 15months, and hyper flexible.
Have known for ages, but struggled to get any help with it, up until last week and we are now in the hands of a physio who wants to help.

Previously paed/GP/physio/mchn have told us not to worry, he will learn to correct, he's getting around etc.

Currently he is commando crawling, but getting into traditional crawl stance, so he can go into the sit position, and he has recently started pulling himself up and trying to climb onto the couch / tables etc.
He has taken a couple of steps, standing at the couch - but certainly not cruising.

The physio is hoping we can get him to crawl in the traditional way, as this is better for his coordination later in life. (this is going to be difficult to change as he is very proficient getting around commando style)

He is strong, but not in all the muscle groups, as he uses his flexibility to stabilize himself rather than his muscles eg, he keeps his legs really wide when sitting (almost the side splits) so he doesn't use his core.
We are helping this with some elastic strapping around his knees, under the guidance of the physio.

What I'm hoping to find out, is if anyone has any tips that helped with their bubs who have had this as well as an impact on the child in years to come?