I just got my leo 110 and need some advice pls.[]

Here are the specs.

Wingspan
1740mm
Length
1770mm
Weight
4.2~4.4 kg
Wing Loading
77~81 dm/2
Airfoil
Naca 0012
Wing Area
54.2 dm/2

I have these two spare engine that I can use.

Saito 150 (with an inverted slimline smoke pitts style muffler) and
OS 120AX (with the standard power box muffler).

Which engine should I use for my leo? I don't have a perry pump at the moment.

Option 1 (SAITO150 with smoke muffler): Shifiting the fuel tank forward and putting a smoke tank at the CG and a smoke pump.

Option 2 (OS120AX): Get a perry pump, tank CG position, but Power box muffler sticking out.

Thanks in advance.