A tail heavy plane will not fly. Period.

The first step, I guess, is to see if you can move existing weight to the front.
Battery, servos - may need to move the RX to the back
In any case, you do what you have to do to balance per plan. add any weight needed to the very nose.

The Tiger has a big wing, any weight will not show.
Your engine is not a screamer, but it will fly it.

the 60 is a fun to fly plane, and it lands to nicely. rebend your struts as per plan

Ray