Well don't sell because you haven't been convinced. And, we don't know what the status is of SGLB's multi-laser capabilities. They have publicly stated that multi-laser is being developed. Perhaps Trumpf has been instrumental in developing it with SGLB?
I'd love to believe it, but when it comes to Sigma Labs if it sounds too good to be true, then it's likely just that.
Besides, Sigma hasn't developed multi laser capabilities yet, and we definitely would have heard about that by now.