After considering the smaller Viper I decided to purchase the Marlin instead plus 4S 2700mA batteries, the Marlin uses the XT60 connectors so don't forget adapters if your used to using Dean connectors like I was and your charger is based around Deans connectors. The whole assembly was pretty quick, not the 10 mins that you see quoted on places like Youtube but maybe that was just me, you will see videos there that also show long leads for the elevator, my were not and that made it a bit fiddly to fit the tail wing. Personally if they could add it into the production process, I would not fit the elevator leads and leave that to the end user but make it simple to feed through, with mine being short, there was no excess movement at all, the elevator leads also needed to be laid flat/horizontal to fit the tail wing so they would fit into the recess in the tail and rear of the fuselage. The flaps and aileron leads are simple to feed through, I just used a bit of thin string to pull them through. I felt it best to test controls before fitting the tail wing to the fuselage, also test your rudder as it's best to have the rudder at extreme max travel to help in fitting the tail wing. What the manual doesn't mention is that I needed a 2mm Allen key for the bolts, 3 in the tail and 5 for the main wing, my kit was supplied with 9 countersunk bolts. I found the undercarriage impossible to fit without using long nose pliers to get the legs into the clips on the wing, the Marlin has nose wheel steering and this was already fitted on mine, the servo for the nose wheel steering goes into a Y-lead with the lead from the rudder servos. Because you won't know which way your servos are going to go, I suggest setting the throws low to begin with. I did do a quick EDF motor power up on a 3s as the 4s's hadn't been charged and what a sound! that jet sound is very evident, the 3s also made a good hand warmer - no harm to the battery, absolute music! At time of writing this, I have not flown it, I have flaps on CH 6 and on a variable control not switches but as I learn with this model, I may go to switches but the variable control (Futaba T8J) will give me unlimited settings, best not to suddenly chuck out a barn door of a flap which could result in an instant lack of speed, I have seen a video on Youtube where the pilot always had a bit of flap, maybe only 2 deg or so. The decals on the Marlin appear to be good, where there is a compound curve the edge of the decals tended to lift a little but soon smoothed down OK. The Marlin was supplied with one piece of Velcro to hold the battery in place which also has 2 Velcro straps around it, so assuming your not going to run on only one battery, more Velcro is needed. The manual is typical of an ARTF manual, the manual applies to more than the Marlin so you have to use common sense as well. One of the simplest best features? A canopy with a good solid latch. Once I've flown it I may come back here and do a note about the flights. Rating is good until I've flown it.