Butterfly e-spinner modification

In 2007 I purchased a Butterfly electric spinner (e-spinner) from Jerry Womack. Shortly after I took a several year hiatus from most of my fiber arts, including spinning.  In 2012 I started knitting again and in 2013 resumed spinning.  I got back out my Butterfly e-spinner but was not happy with the WooLee Winder that I had gotten with my e-spinner. I tend to spin very fine yarns, and the WooLee Winder pull in was too hard and erratic for these very delicate yarns.  It works fantastically for plying, and I am sure it would be great for thicker yarns, say above lace or sock weight, but for extremely fine yarns from shorter fibers it would either not pull in or it would give sudden hard tugs at the ends of the bobbins where the direction turns.  Neither of these is conducive to happy spinning.

Since a WooLee Winder is only one of several flyer options originally available for the Womack Butterfly e-spinner I tried to contact Jerry Womack for options only to find that all contact info I had for him no longer worked.  I hope he and his wife are well, but my best guess is that they are no longer involved commercially in the fiber arts so I needed to figure out whether I could make changes to my e-spinner without assistance.

One of my regular spinning wheels is a Lendrum, for which I have all but the quill head, and several extra bobbins.  I checked the length and it looked like I could use a regular Lendrum flyer on my Butterfly, if only I had the right bearings.  So I took measurements and ordered a bearing for the front orifice.  This bearing didn't seem to want to come off of the WooLee winder flyer that came with the Butterfly, so I didn't try to remove it.  The rear bearing is smaller, but comes on and off easily.  It has to be removed every time the bobbin is changed.

The new bearing and my regular Lendrum flyer fit just fine on the Butterfly spinner.  There isn't any particular pulling like the WooLee Winder does when changing directions.  The most difficult thing will be remembering to move the flyer hook as I'm not in the habit of doing that with the WooLee Winder!