Personally I think it looks good. Just completed my Hobbistar 60 and I suspect they are similar airframes. My tank mounted in suspension in a precut cavity just behind the firewall. While I couldn't wrap it in foam I did shove some foam into the gap of the suspending formers that applies light pressure to the tank and minimizes vibration. The objective other than keeping things still is to minimize foaming of the fuel.

Balance to the CG as recommended in the literature that accompanied the plane. I went on and acquired a CG stand even though you can just use your fingertips. (I knew I'd be building other planes and I'm a sucker for gadgets anyway.)

Tie a piece of thread around a panhead sheet metal screw and toss it back in the fuselage to see if it will bring the balance in line. Remember, the further back the less weight you will need and overall weight is what the wing is carrying and the motor pulling. You can vary this by using a smaller screw and some washers but its difficult to access the inside of the fuse without removing some covering. Then note the position and screw it in the bottom of the fuse. You can also slide a large washer back and if you can access the bottom of the fuse behind the servos enough to slide it back....once you find the spot, drop some 30min epoxy back there, slide the washer into postion and then dribble a little more epoxy in the center. Just be sure you get it where you want it because you're not going to want to remove it later.

I was fortunate in not needing any additional weight for CG but did epoxy a washer in a wing servo bay for lateral balance. Also used monokote to seal my hinge gaps on all control surfaces. Its a pain and I notice some coming loose and I'll have to reheat it and or do it over. The clear packing tape sounds nice for electrics but I'd like to know how well the adhesive handles the oil residue of a nitro plane. Even after going carefully all around the covering on the ARF and then applying Monokote to patch wing servo bay installations and the control gaps I found both my monokote and some factory covering pulling up after a half dozen flights.

At any rate; if you're experience goes like mine you're going to have a ball!

Congratulations,

Clay