G'day again. I am agreeing with madtrev again. I have two Goldberg Anniversary Cubs similar to the model you are talking about. One is quite old and has had several engines. The other is about 12 months old and has had only one. You asked about Saito. If you have the cash I would say a definite Yes. And if you don't, they are well worth saving for.

Like Trev, my most used engine is an 8 year old FA-56 which has been in constant use during that time. It starts easily, runs brilliantly and is a nice size for 40 class models. It is also fairly light for its power output. Most of my other engines are Saitos too so you won't get any complaints about Saitos from me. My quarter scale Hanger 9 Cub has a Saito 120 in it which flies it really well with plenty in reserve. It has a TurboHeader muffler on it which makes fitting the muffler mostly inside the cowl easy. If you search this site you will find them.

My older Cub started out with an OS 70 Surpass. It flew well but was very un-scale like. The 70 was too powerful and too heavy but it was fun for a while. Next I tried an OS 52 Surpass. This was fine. Plenty of power in reserve but happy to plod around. I tried an OS FS 40 next (the old model from about 1980). It would fly the model but was very scale like for a J2 and had nothing in reserve. Next came an OS 40 Surpass. As it was new, it was still running in but it just did not have enough to give a margin for tuning error. An ASP 52 and then an ASP 62 were next. Very similar results with the 61 being slightly more powerful. Both were fine. They are very similar in size and weight. These days it has an OS 52 again and flies well with it. At one stage it had a very old Enya 46 and this was OK but a little undernourished.

My latest one has a Saito twin. There are two Saito twins suitable for medium size Cubs - the 60T and the 90TS. They were both designed for the job. The 60T was my first choice and was designed for normal land based planes. The 90TS has a bit more power and was designed for float planes or for Clipped Wing Cubs. The Clipped Cubs had slightly more powerful engines so they were more aerobatic and flying off water needs a bit in reserve. I bought the 90TS because I could not get a 60 and I am very pleased with it. It flies the Cub really well and sounds great.

The photo is the Goldberg Cub with the Saito 90TS about to land. It will eventually get a more scale like exhaust and undercarriage.