Want to modify a complex shaped plastic part; need a good, inexpensive, scan/service

[LambdaFF]

IME, your estimate is wildly over-optimistic.

Put here a sketch with key dimensions, I'll design it for you.

[robosmith]

Put here a sketch with key dimensions, I'll design it for you.

Thanks for your offer, but I have imported a photo into sketchup, scaled it to the major dimensions, and attempted to trace the outlines.

I spent 3+ hours on it, including the enhancement pieces, and printed out the base part. Unfortunately the photo did not scale exactly and some of the features I missed were critical, so I'll be investing more time to get it right.

I was hoping to avoid this by getting a dimensionally accurate scan, but I guess that's hard to come by.