Guys, this is all the help & advice I could ever wish for. I am truly indebted. Thanks to one and all!
A few remarks:
1 - I have read & considered ALL of your kind inputs and I study your pics in detail. If you should find I have here or there not responded to your specific hint and not executed my new wrongko as you suggested, please do not think I did not agree. As I wrote to Alan, I need to do it in the way that works for me. Oftentimes one's work, as it is progresses in the workshop, dictates to one how the next step needs to be taken to ensure a good end product.
2 - Having procured a good enough piece of wood from a friend for the remake (2nd try) of the gambar, I found myself better able to work the wood. You will all know: practice makes perfect. I'm sure if this 2nd try does not work out and I have to do it once again, the 3rd gambar would be even better! Imagine if I had to make a dozen Bugis gambars, how well organised I would be after the last one!
For this 2nd try I made a cardboard template for the opening in the top of the gambar where the blade is inserted. Although I was quite satisfied with the first try without the template, this second one is just about perfect! I laid the template over the top and scribed its outline on the wood. Then with my new-found expertise with the angle grinder and a motley assortment of special bits in my vertical drill stand, I removed the wood required and was met with a truly beautiful fit.
3 - I'm not really very impressed with the wood I got from the friend, as it is a bit too grainy for my liking. It looks a lot like Bluegum wood to me! But I have come quite far already and can't turn back now. Pics will soon follow!
4 - To be very honest, those tongues and side-mounted tenons some of you described, which go between the gandar & gambar sound terribly hard to carve.
I am intimidated, and I still have to go there...
