To my knowledge the only vehicles tailored to the pilot's height are space-capsules, F1 racing cars and my drone. Measure your test-pilot with a set-square and standing on whatever might be used as a base in the phone-box, like the leftover foam here. Note too how that resin-gauze repair will ensure that Monty's head won't fall off in flight ~ few people besides Henry VIII would want to see their loved one's head come off at Christmas.