Altazimutal platform platform measuring 36 inch.x 36 inch.The altazimutal movement is a full 360 degrees. Altitude movement is limited too 15 degrees. A 15 degrees high slice of the sky may be tracked for up to sereval hours.No modification to your Dobson is required. The altazimutal platform run with altitude and azimuth motor controller circuit board and steppers motors. I made the platform myself from the mechanical circuit board and stepper motor supplied by TL System. I have this platform for one year. My price
would be 300.00 $ but negotiable, transport furnished.
Martin Rochette, Quebec city, Canada