hey there, record to ILDA is it. I took a look at your output, I didn't see a cube.rtd but found a sphere.rtd.
First of all, nice effect! I think once it's done to fit a projector's capabilities it will be very nice. You have some potential!
Secondly, there are some things you should know about laser output. The ilda file in that archive is unoptimized, meaning it only contains enough points to draw the effect on a screen. To draw that effect with laser takes many more points. This is one of the reasons why the output is larger. I could create a show for you that uses 100k of source ilda files but saves to a gig of output file, just due to laser scanning optimizations and the length of the show. In order for this sphere effect to be scannable you have to take the flying line count down quite a bit. Once you get your projector you're going to find out what's doable for a projector, and what's not. That is half of the art of show creation. Hang in there, there's a lot to learn but I think you'll do well.