I have the Pica P-51 with a Moki 2.10 in it and love it. My friend has the same plane with a Moki 1.80 and loves his too. Both come in around 22 lbs. my 2.10 has plenty of power to get me out of trouble and flies the plane with plenty of authority. My friend says he wishes he had bought the 2.10 instead of the 1.80 but since his 1.80 does so well he won't change it. I'd say go with the 2.10, you can always throttle back but when you're at full throttle with the 1.80 and wish you had a little more.............................

David