You could always do what I do and that is after getting an inital rough drift with the reticle (a high power eyepiece would do well enough) I then finish my drift using the webcam and K3 CCDTools. As you can see from the attached image the dec drift was almost neglible (just over 2arc") for the first 1000 sec or so (bit of up and down in some areas for some reason
), and this is on a light EQ4 mount. On a good mount like my G11 I can get negilible drift in Dec for over 2000 sec (with no bumps) if I set my mind to it when drifting. Fortunately I don't need that sort of time frame for imaging normally. Consequently I don't have to autoguide in Dec normally and only have to worry about the RA.