The kit was supplied by Zenithair  They have been helpful with information,  C.H. himself, hand sketched me a plan to increase the rear locker size even further so my wife can fit in an extra duvet, as well as the tent, stove, 2 folding bikes, food, sleeping gear, liquor, extra gas and dog. It still flies fine when "heavy" but rate of climb is down and we don't go into super short strips. Also the permissible "G" loading comes down so I am careful with routes and weather.
With the Rotax 912, 79 hp set at 5450 we flight plan at 80mph, or 69 kts and it seems to work out well. I have a Ball digital ASI and a cheap Garmin GPS (XL45) which is really for boats. It has a speed limit of 99mph and it occasionally blanks out when I exceed it. It restores  again quite quickly when speed reduces. I have also made an angle of attack indicator which is helpful in finding some speeds, particularly power off vs. engine stopped approaches as the 701 glide characteristics alter dramatically. (See the flying section). This sits forward of the leading edge and appears to register about double the true angle of attack. i.e. 50 deg. indicated is about 25 deg. true.

Maintenance on the 701 has been quite straight forward and simple. I have done a few tiny mods. to make the airplane more suitable for me, or to better withstand some of the very rough ground on which I operate, bearing in mind steep approaches onto short strips do not allow the luxury of pussy footing the touchdown. The first was a requirement to beef up the front axle a bit. Next was running the big wheels at a low pressure to absorb some of the shock, (8 psi). Finally,  the nosegear was taking a hammering and causing excessive firewall flex so this was stiffened up a bit and now seems fine. I think the kit comes out strengthened in this area now. 
I use AMSOIL 0W-30 grade synthetic oil in the 912. This has the advantage of being able to flow from the oil container through to the engine at low oil temperatures. I have heard of some reports where there has been an oil pressure drop on take off due to cold thick mineral oil's inability to flow freely. It takes for ever to get an oil temp. rise on the clock. I use water temp. as my guide as one must still be careful to ensure the cylinders are nicely warmed before applying full power, otherwise the pistons can heat and expand faster than the cylinders causing scuffing etc.
We get caught out and end up flying in rain at times which is rough on the 3 bladed GSC prop. I reduce to minimum speed & rpm to minimise damage. I tried high speed tape on the leading edges of the prop but this degraded performance. I have scrapped that and have been re-finishing the prop with Nyalic,  This is an easy flow self levelling clear finish. Being aware that I was getting the prop out of balance, I made a balancer. The spinner was removed and the boss behind the spinner was drilled right through. The 5/16" thread that accommodated the spinner bolt was tapped right through. A 5/16" bolt 1 1/2" long was threaded all the way and the head removed. The bolt was then put in a lathe and a fine hole drilled right down the center. The bolt is then screwed in almost all of the way, leaving about 1/4" showing. With the prop removed a nylon line is inserted from the back, with a knot in the end to prevent it from sliding right through. The prop is then suspended by the line and lies horizontally. (The wing strut / jury strut intersection make a convenient securing point.) Once the prop stops wobbling mark the floor under one tip. This becomes the reference point. Measure up to the tip and record the measurement. Then rotate the blade until the next tip is over the mark. Wait until the prop is stable and measure & record.  The same for the next blade. Mine was badly out with 1 & 1/2" difference in readings. I had noticed it in flight particularly at lower rpms.  Painting on a little Nyalic in the right areas soon had it balanced. It was much easier than I had imagined and only took a few minutes. When dry a minor adjustment was needed for fine tuning. When I put the prop back on I also fitted a mercury balancer that GSC had sent me. That was simple to fit, it slips onto the flange and the prop bolts go through it and sandwich it in place. As soon as I started the 912 I knew I had a winner, silky smooth through all rpms, better I think than when new!