[Solanum]

I found the original focusser in my GSO Dob to be rather inprecise in use, so I replaced it with a GSO 10:1. However, I find that with moderately heavy eyepieces (I'm not talking 2" monsters here, just anything more than a Plossl) I find that if I adjust the tension screw so that the tube doesn't fall back in under the weight of the eyepiece then the 10:1 only works in one direction (inward).

Is there a simple fix for this? Alternatively, should I be looking at a better focusser (nice though it would be I'm not in the market for a feathertouch/moonlite etc. Are something like the JMIs reasonably priced and worth buying?