I'm not implying anything!
It's just that 25hp seems a bit underpowered for dual wanding. Just had a look at the site actually, they state airflow figures of 543 cfm which in theory is ok for 2 wands. That's a lot of performance out of a relatively small engine, either they have a very efficient design or the stats might be a tad optimistic

It's probably perfectly alright, I'm no TM expert but it just seemed a little bit too much performance from an engine of that size. You might have to thrash the nadgers off it at full revs to dual wand effectively, which obviously has implications on fuel, servicing, wear and engine life.
Guess you need a real life testimonial from someone else who operates one...