viticulture advice continued

Thanks again for all of the advice on my previous post,which will take
some digesting,but very informative.My technique so far has been as
follows.
1.Early in the summer I start taking out lateral side shoots so that I
do not get too much of a thick unmanageable hedge later on.I do not
take them all out as I wonder whether they will help the grapes grow
and mature later.I am still unclear as to whether this is correct and
whether I am inhibiting bud formation on those canes I leave for next
year.(I use Double Guyot cane pruning and leave a couple of canes
growing from near the old base for next years canes.)

2.I tie in the main shoots vertically early on to prevent them getting
tangled.Sometimes with the occasional strong winds,these blow
sideways,and I really need a better technique for tying in the
shoots.I use 2-ply string tied tightly round the horizontal wire,and
loosely round the vertical cane-however tight I tie onto the wire it
tends to move,and I think I need a better technique.One book I use
suggests twist ties(plastic coated wire),but surely they are difficult
to remove during pruning?

3.About the end of June(i.e.now) I start hedging by top cutting the
longest canes,and continue to take out some of the long side shoots(is
this correct?)-perhaps I should just hedge the vines top and sides?

4.During July and August I start leaf removal (not all ) around the
grape clusters to let the light and sulphur spray particularly into
the grape region.At the end of August I stop pruning and net against
bird attack(we have woodland all around and this is particularly
necessary quite early).

Thanks again,Michael.Any further advice very welcome.