If you follow the procedure as described in the help file, you'll not get a full wheel. Did you set the individual values correctly? Did you set the guide mode too?

A matrix construction is usable as long as you can define groups that have the property of having an exact amount of correct numbers in each group.

Anyway, gat can not provide high hit precentage for 2 numbers so to have 3 groups with 2 correct numbers at the same time will probably be similar to waiting for some gat to hit 6 out of 6

In this particular matrix, it is probably almost equivalent. However you still believe it is possible to match a 6 win with the bare minimum of numbers. If you can understand that this is impossible really to do, you'll find good approaches to follow even with matrix and more numbers. What approach to follow depends on what you can assume and accept as constraints. If you can define such groups with that requirement, matrix is rewarding. If you can't distinguish groups then use a normal wheel. The basic point is to figure out first your budget and then decide on a strategy to follow. But don't expect that easily a very good win when your budget is so low. There isn't any magical formula to give you a 5 or 6 win with 4-5 blocks or so. You have the ability to introduce constraints to limit your budget and based on what you are willing to accept as constraints, you can reduce your cost further. GAT can help by improving the odds to have those constraints fulfilled. WG can help to make these constraints a reality. If we don't have that boost of odds then playing random picks is equivalent to any other approach really, name it a wheel a matrix or whatever.