Extending tomato height

At this time of year the problem for me is the unlikelihood of the tallest trusses, which are only flowers at this stage, ever having the time to form viable fruit by the end of season. Even if the weather stays good, the lessening hours of daylight hamper the tops ever giving proper ripe tomatoes. So I pinch out most GH tops, a) because of height restriction, b) to encourage lower fruit to ripen and c) the top flowers won't produce fruit in time. Although if the top truss bashing against the roof is made up of fruitlets I usually leave that alone in the hope of miracles.
Ever the optimist, you develop that being a gardener . Mikey, I think you are blessed with enough of both space and height to experiment. You'll have to let us know how your top trusses get on.