the Tiger 2 is built very excellent with its very little flexing light plywood fuse and large wing
i aquired one with very little damagemade it a tail drager
i run a Webra 61 champion speed in mineold school very powerful 61 ( turns 1000 more RPMS on the same prop as my OS 61 SF )
i would run a 55 AX or 65 AX ( depending on weight needed ) if i was needing a newer engine design for the airframe
the 55 AX and all the OS AX series of engines just produce more power for an OS than any engines of the same size did in the past
i fly a 75 AX in my 60 size Stikmost powerful 75 i have used myself
do remember to add more engine if you need nose weight to balance well
i run 15 % morgan omega fuel and recommend you do the same for long engine life (need the castor oil )
you made a very good choice for a second plane really good flying smooth aircraft
welcome back to the hobby !