Dear Group, It seems that there has not been a definitive answer to Gary Scott's request, namely, will there be a way to provide M1 measurement data via a hardware upgrade to the X-Rite iSis? Could this not be done by simply replacing one of the two bulbs and/or possibly a change in software? I for one (there you have it, a new X-Rite product - “i4One") would be happy to get on the M1 bandwagon, but not at $3K - $4K or thereabouts to replace the iSis. I believe this would very much slow down the adoption of M1 IMHO. Many thanks for any insights, Ernst Vegt