It helps with them all to have experience . The HMX manual has extensive exploded views (good) but for text/instructions, it's mainly just assembly instructions to get it put together and that's it (not so good). Compared with others it's short (for example, the Thunder Tiger manual for the E325 has a whole section explaining how the rotor head, CCPM and blade system work), but you can supplement it with the info on RCU, RCG and helifreak. It doesn't need to slow you down, but it would be nice if there were more; it's about the same level of detail you'd get with an average plank ARF.