The tube assembly is only about 10 months old, the optics are the best I have seen. Good star test, better than the 2 8inch and 10 & 12 inch reflectors I have used. The EQ mount I made in the engeneering shop I work for. If you release the nut under the polar axis, you can tilt the axis to AZ mode for quick change of objects. The mount is made out of steel, but dismantles into 3 parts for transport. The tube assembly can be sold separately for $200.00. I have origanal box for postage. With mount $230.00 if picked up.