FIREWIRE GEM LONGBOARD - THUNDERBOLT TECHTAYLOR JENSEN GEM X MODEL THUNDERBOLT TECH LONGBOARD The Gem is a collaboration between Dan Mann and 3X World Longboard Champion Taylor Jensen. Earlier this year Taylor asked Dan to consider a one board in the trunk option for long boarders who want both trim and turns; he was essentially asking Dan for a design that would land somewhere between his TJPro and his TJEveryday. Dans response was an intriguing intersection of shortboard style concaves