Hi Greg,

> (What if I get something wrong, what if a requirement
> changes, what if, what if, what if...)

Well, you just delete pieces that you don't want and draw some replacement pieces...

When drawing and creating things happens very quickly it's not such a big deal to redraw particular pieces.

However having said that, I do want to add a deeper history function in the future. It's a pretty involved area so it's hard to know exactly when that will happen though.

In the meantime if having the ability to do history updates is a vitally important thing for your particular workflow, then you should probably be using some other program that puts a lot of emphasis on that type of process as its main function. Of course a kind of more cumbersome drawing and modeling process that tends to make you go through more steps is usually a part of packages that put a lot of emphasis on that kind of stuff - for MoI it is much more of a priority to have drawing and modeling feel really quick and light and not have a lot of steps and processes to go through.

But if you don't want to do quick modeling and drawing and you instead want to do more heavily planned and constrained layouts that can be tweaked with history, there are quite a lot of CAD programs out there that are focused on doing that already, like SolidWorks, SolidEdge, Alibre, Pro/E, etc.. etc... etc... MoI is actually focused on a different feel than that partly because there are already so many choices you can use for doing that style of modeling. Instead of trying to make MoI a kind of clone of programs that already handle that style of stuff I wanted to make it have a kind of different focus.

It may be a good idea for you to use MoI in combination with one of those other programs - maybe use MoI for your early process stuff where you want to draw more freely and use one of those parametric MCAD programs when you get to more nailed down designs...

But it's important to use the right tool for your particular job - if history is a major criteria for you, then MoI is probably not the right tool for the particular task that you're trying to do - it's not really a focus for MoI to be an exact drop-in replacement for a production MCAD system like SolidWorks or things like that. If you're trying to treat it like that you may be using the wrong tool for your job, kind of like trying to pound in nails with a screwdriver or something like that.

- Michael