Hi Malcolm,

If your "is this enough" question relates to there being enough
landing for the
drawers to slide on, I think the answer should be - how snug will the
drawers
be in the carcass. ;^) 

If there is little side play, and the drawers cannot skew because of
the guide strips
between the uprights, then there seems little point in making the
bearing
surface - the "slide" - any wider than the thickness of the "glide
strip", which, I'm
guessing from the picture at woodgears, is as wide as the drawer sides
are thick.

If you cut the slides from say 100 x 19mm DAR stock, you will finish
up with somewhere 
around 22 x 19 material once dressed.  Let into the uprights x 4mm
leaves you 18mm
of glide surface. That should be adequate.   

Cheers
Peter H in Perth

------------------------

being inspired by the methodology depicted here..
http://woodgears.ca/workben
ch/drawers.html

 I did plan to use 19mm x 19mm jarrah for the drawer slides, however i
realise that once I have seated them 4-5mm into the upright, only 15mm
or so will be left protruding to support the drawers.

 Is this enough ? Perhaps i need to go up a notch to the 38 x 19mm ?
This’ll allow me to seat them lower in the upright and giving me
more slide for the drawers to sit on.