I faced the same dilemma. After much investigation, MaxDomeII seemed the most plausible way forward despite the cost. I did purchase a Velleman board, but I stopped heading down this path when I wanted shutter control to go fully robotic/autonomous. The whole RF comms and two stage shutter opening/closing would require further consideration as Brett alludes. If one could package up on the cheap, then they would have a winning combination. Have to say that the MaxDomeII install has been running for a year now and its been flawless.
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