Roger and others,
I've been using the RF 20151's and number 6 screws without incident. I
think the secret may be that any wood screw imbedded through the wood core of
anything must be bedded in epoxy. I used long enough screws to penetrate
right
into the air chamber and make sure that the side of the hole is saturated
with epoxy twice (about 5 minutes apart) before installing the blocks and
screws. So far, no problems. It is important to cant the blocks as shown in
the
manual so that angle of the screw holes bisect the rope angle entering and
leaving the block.
I hope this makes sense.
Bram
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