Hi Dinesh
I did hit the robo with a touch of 'Clean N Polish'. The ball doesnt really polish that well but it was enough to get it through the heads. The ball wants to flat out hook, if you can't turn one, you wont turn anything
The Machine is like a 5.0 on steriods, it can handle more oil and is more angular at the breakpoint. It will out hook the 5.0 by 4-5 boards
The Delta is a perfect fit between the Robo and the Machine. In regards to length, the Robo hooks earliest, followed by the Delta and then the Machine. The same order applies in regards to total boards covered.
I don't really get a chance to use the Robo that much which is dissappointing. I think my current favourites are a toss up between the Machine and the Artillery.
The Artillery is low RG and just rolls heaps. It's a smooth arcing reactive ball with a strong symmetrical core. As you can see by the video, it is the smoothest of all 4 balls when they hit friction.
I'll be in Townsville this weekend, come to Kirwan and we can chat
I'll also bring some test balls with me for you to try!