ASW19b best descent rate on approach (full airbrakes)

Hi,

I have just received our ASW19's flight manual which says to make the
approach as follows:

"The approach should normally be made at about 46 knotes. For
turbulant air a corresponding faster speed must be flown."

I have been told:-
a) that the unmodified air-brakes have a limited affective speed
range
b) it is not worth adding the extra paddle if you maintain good
speed control.

My experience is that:-
a) I normally approach at 53 kt + half wind speed and it floats for
ages.
b) I seemed to remember that coming in at 50 kt the elevator
authourity at round out was not that good. (I do tend to round-out
late, so could be more progressive with this).

Questions:
a) 46 kts seems a little low - what do other people use ?
b) has anyone got any measured information on glide angle against
speed (with full brake).
c) is there a maximum speed you would use on approach (in high wind
conditions) in order to keep a high rate of descent and therefore a
stable configuation.

I have just got an iPAQ, etc, so will try and do some measurements
(i.e. at height take logs of full airbrake descent at different
speeds) and post the results here.

Regards,
Rob Sharpe

PS: According to the flight manual it side slips well, so will try
that as well.