Speedi Sleeve questions

Hi List,

Couple of questions for you Gear-heads out there as I'm thinking I should 
fit Speedi Seals to
my Sprite rear axle.

Q.1     What Speedi Sleeve part number should I ask for?

Q.2     Should I leave the Flange on, or not?

Q.3     What's your experience of  Speedi Sleeve?

Q.4     Are there alternatives to Speedi Sleeve? (I don't include having the 
axle ends machined.)

Thanks,

Ron, in Ireland
'59 AN5 "Oggibip"