Does anyone know how to drive a 9.25"Evolution in RA only at Sidereal rate , so I can do a drift alignment ( I cannot see the pole ). The Sky Safari Pro app and Sky Portal app in help scree both refer to an `drive in RA only " option for drive speed type , but in both apps I only have an OFF Sidereal and Lunar rate option . To do a drift alignment I don't want the mount driving Dec. I have tried all the alignment options from both Android apps and hand paddle , and I cant get the within 1 degree of the pole .
On a side note I realise this mount is not going to be any good for imaging other than short focal length camera lenses , as I measure an orthogonality error of about 0.5 degree between the fork and the tube in its Vixen style dovetail mount , and that's when its unloaded by the scope being tilted over when on the wedge . So this error is going to vary depending on the position of the single fork in relation to gravity .