That design is nothing to laugh at. Looks good. Also looks like it will be alot of work (but those always end up as the best sabers anyways).

I always draw my saber designs out by hand. One thing that might help is if you draw it again with all the dimensions written in a different colour. As it stands it is a bit tricky to tell how big certain parts are (I.E. is there enough room for batteries etc.). I always find this can be very helpful. If you draw it to scale, you could even lay your pieces on the design to make sure it will all fit. It will make it a lot easier for us to help you further