Ive took the plunge and bought a yaesu 991 am now in process of building a few new beams now i used to have a program that calculated boom length and element sizing and gaps between elements but cant think of the name ive looked at loads which give element lenghts but not boom lengths so hope you aerial gurus can help.

Just type in yagi beam calculator on google and a few come up.

That yagi uda one is better tha the same yagi uda i had as it allows you to choose element amounts as i need to make a shorter beam than i already have so make a 2m 70cm dual or 2 seperet beams as i have sat a 17ele tonna for 2m and a 32 ele cushcraft for 70cms and at minute there a bit big.
Thank you.