The new precision thriple-bearing aluminum engine block is designed to replace stock plastic engine block for T-REX 700 Nitro helicopters. The new aluminum engine block is designed with rigid one-piece aluminum block to avoid wear-out problem that leads to unalignment of the pinion to the main gear, thus causing the gear strip problem.  The bearing block is very well designed to have both rigidity, precision and very light weight. To further strengthen the engine clutch, this new design incorporates an additional third bearing into the engine block.  This additional bearing provides great support for the motor pinion shaft to keep the pinion always aligns with the main gear.  This engine block is the ticket to solve main gear strip problem on the ALIGN T-REX 700 helicopters.