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Does the suspect motor sound different from the others -- like with a "raspier" rougher tone? If so you may have a problem with the bearings. If that's the case, then this might help: http://forum.freeflysystems.com/index.php?threads/replacing-the-bearings-on-a-qc-3328-motor.563/ Andy

This might help: http://forum.freeflysystems.com/index.php?threads/aligning-the-motors-and-checking-for-runout.334/#post-3276 Regards Andy.

Hi Steve: The USB connector goes straight to the USB pins on the CPU but on the MK Wiki page it is shown as USB: Not used. Andy

That's very kind of you, Gary. I got it. Many thanks. Andy.

Thanks, Gary. I wondered what people were doing for eCalc. I've not seen a single worked example for a Cinestar 8. Andy.

Do you happen to know which model of Tiger, Gary? I calipered the end of the QC-3328 shaft (well, as much of it as I could get to) at 3.93 mm, so call it 4 mm. The OD of the bearing is 11 mm. Thanks Andy.

Hey Gary: Yeah. It's confusing. I'm not sure which the correct bearing size is for the QC3328's yet, either -- and I've not been able to determine which is the closest equivalent to the QC3328 (I don't know whose motors the QC3328's really are). Andy.

Ohhh....it's soooo nice to see well lit video with good audio.... Thanks -- that video is just what I need. Good job! I'll post a link to this thread, details of the tool and the video over on forum.freeflysystems.com -- I just need to get the some ceramic bearings from Boca Bearings and run...

Thanks for the super-prompt service, Bart. Do you have any on-line documentation to help those of us who are newbies to the bearing changing business, please? Thanks Andy.

The word I'm getting is: "I can tell you the MT3515's are a lot larger then the QC3328s..." I'll see if I can find out about the 3328's wrt to the Tiger 2814s. Thanks Andy.

Good question, Bart. I'm not sure. Let me find out and get back to you. Thanks Andy.

Hi Bart: Is your tool available for the QC-3328 motors, please?. I believe they take a 4 x 11 x 4 mm bearings. If I may, I'll post your response on the forum.freeflysystems.com . Thanks Andy

David: Did you solve this problem? Andy.

I've got three of them. Two currently in active service. They work very well. You will need to take the time to tweak the two pots on the board to get the best quality imagery for the superimposed data. Be sure to get the most recent firmware (going from memory it's 3.2) otherwise attempting to...

Rather Good Guide to Spraying MK Boards. This may be helpful to those who have MK boards. Andy.