cleating thoughts
Hi Steve,
If you look at most mid ship solid-cast cleats, they are constantly at risk for catching sheets while tacking or jibing. A regular feature of DIY articles is some sort of SS/bronze wire bale for slipping over the cleat to shed lines or removable shaped blocks of wood to fit under each end of the cleat horn to shed lines... Stubbing your toe on one gets you extra credit.
Most boats intended for active sailing do not have these "extra" cleats for such reasons, IMO.
OTOH, you are absolutely right that tieing to a dock normally does require spring lines. Method "a" is to spring back from each end of the boat to a middle tie point on the dock, and "b" is to tie back from each end point on the dock to a mid-ship cleat on your boat. To make matters worse, most folks (me too) have used stanchion bases for this for years... and not all of these tubes are really meant for this kind of stress/force on a 24/7 basis. I have used a chain plate with no worries about strength, but then you get into chafe issues, albeit solveable with leather or carpet scraps.
I prefer the T-track cleats because they are removable, or the rail/deck lay-flat kind, and we have two of the later, and one of the former that I picked up cheap at a swap meet.
As to strength of the track. "No worries, mon." That track was made to take loads of up to, say, a thousand pounds... as your Ericson 35 barrels through squalls on the three week trip to Hawaii.
This opinion worth...um, about what you usually pay for it.
Cheers,
Loren