More DIY, well, more like Delegate it Yourself

For ages I've been wondering if it's possible to convert one of my current bathtubs to a walk in shower without major renovation.  I was musing with a friend ages ago if it would be possible to cut out a section of the current bathtub and put in an insert to seal the gap and make it watertight, so I could just step in.  She was very amused at what she took for a flight of fancy, and I didn't pursue it at that time.

But today, as I was looking through links about bathroom conversions, I found this, yay. 

And I've sent it to my lovely across the street friend, artist, and contractor, to see if we can work together on this.  This is another of my steps to Stay In This Home, just a safety feature I've started thinking about, it getting a bit more iffy to step over the side of the bathtub to shower.  

I'll still have one full bath, though.  And that's another part of my Big Plan.  If ever I need a person to stay with me, the Nook bedroom has its own full bathroom, great privacy, doors connecting and can be closed to the hallway, all that.  So this is just some longterm thinking.  I'll leave that bathtub as a full one, but convert the other bathtub, the one leading off my bedroom.

Anyway, as they say, that's the plan!  much cheaper and less disturbing than tearing out and replacing the bathtub itself. So here's where I ask if any blogistas have experience with this?  any precautions? additions?  the bathtub in question already has a grab bar installed years ago for Handsome Partner, and a portable shower stool, and a hand held shower, so that's all in place.