I haven't seen the LG problem with the 4* but I do fly from hard packed and not grass so this is new to me. The LG block/plate can be changed so the LG can be moved forward and back If required. The SIG instruction book has photos of most everything involved in the build so it makes life easy. Great planes also has the great photos and step by step instructions. There really are a lot of good choices on the market for the second plane. A lot depends on what the builder likes the most.
I went to the Up_Roar for a couple reasons. I thought it looked like fun and an easy build but it could have been the cost of the kit too. Back then they were just under $40.00. It only used a small bottle of CA {I bought a 2 ounce bottle} and a little epoxy. The plane will fly beyond good with any .40 to .46 engine, I built 8 of them over time and they all used the .46 OS LA. even to compete with. I was told it was too much plane for me but for some reason I had no trouble flying it?? It will really get with the stunt flying but chop the power and it could glide and float in to land? I don't know why but it just fit my flying skill at the time? Not a clue why.