I had a flyer and the squeaking nearly drove me demented!
I followed Brook's instructions about oiling and that cured it for a while..... but it came back again and again and again.
Inside a year the structure broke - thankfully when I wasn't on the bike.
I returned it and traded "down" to a B17. Within 3 weeks I clocked up about 1600 km on it, so it was broken in quickly

I find hardly and difference from a suspension point of view - the Flyer was very stiff.
Frank