I have so far only 'pruned' my 'Firesticks' along the edges - so that it does not grow out across the sidewalk. My big regular E. tirucalli, is planted right next to the pathway to the front door so that gets regularly pruned, but again I do not really cut the main stems so much as mostly side branches that start reaching out towards the pathway/sidewalk. The big ~8ft regular one is the real gusher.
