Is anyone using either the OCAL Electronic Collimator Pro or the Hotech SCA Laser Collimator with the Edge 8?

If so, could you please share your experience/results with this device?   I am wanting to collimate indoors but don't have enough room length our straight-line house length to set up an artificial star and I don't want to collimate at night.  I also don't want to use the Hotech Advanced CT Laser Collimator as it seems overly complicated. A friend bought one and had a difficult time with it. 

Thanks!
Jerry
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