Ooznest workbee wheels clearance too tight

I'm in the process of assembling workbee 1500x1500 (screw driven) and I came across of a strange problem. After assembling Y plates and moving the eccentrics all the way it should be to allow biggest clearance between the wheels, manual says that when i run any piece of C-Beam between the wheels, it should wobble a bit.
In my case instead of it being wobbly, i hardly put that C-Beam inside. I think its too tight already. Shortest C-Beam which will be used for Z-Axis is not entering by itself by gravity. I must push it in. And it happens on both - left and right Y-plates assemblies. What should I do? Now I've assembled also z-plate with wheels and only one way to move C-Beam through (and it moves very smooth then) was to loosen all the M5 bolts so all the wheels are wobbly when I move them. Maybe that's the way it should be then? Have bolts loosened? Maybe I'm overthinking it? I will try to complete that build, then I will check if it's ok But still, that Y-plates wheels are still worrying me a bit.





Also i've got another question. i've seen on openbuilds official tutorial video that you guys at Openbuilds are using maximum amount of wheels that are possible for that Y-Plates (and that was for 1000x1000 build).
In Ooznest instruction i'm told to use 2 pairs on the top and 2 pairs on the bottom (like on my photos uplaoded). I's it sufficient for 1,5m x 1,5 workbee machine?

I've asked Ooznest support too but it's saturday so maybe i will get faster some suggestions here.

 

Thanks for the suggestions. I guess that loosing M5 bolts a bit is the right answer. I have good feeling about this

 

Well, without the C-Beam inside they are wobbly. Without it i wouldn't be able to put C-Beam inside.

 

Space from center to center of the v-wheel bolt = 99,65mm (this time i've measured z-plate, as i'm assembling it now)
Complete v-wheel diameter = 23,95mm
C-Beam height = 80mm( in the side where is that ACME nut-blocks space), and 79,85mm on the whole-alluminum side, which is bottom in the picture below)
C-Beam width = 40mm
Well, dimensions of the C-Beam are probably the same as shown on the picture below (checked some of them and everything looks ok):



I've used mechanical calipers so i't can be a little wrong. Will have electronic one's in about an hour.
But on the paper and when measuring, everything looks ok.

If I will assume that my measurement about right:
beam height + 2 x wheel radius - 2x wheel recess on the C-Beam for the wheel = Space between 2 bolts
80mm + (2 x 11,975mm) - 2 x 1,8mm = 100,35mm (space needed for wheels and c-beam)
So 0,35mm more than the distance between the centers of 2 wheel bolts. Of course it's true if accentric nut is in the center position. Accentric spacer can go max 0.79mm of the center (am i right?) So if i will twist it to the most wide position it should be OK.

That was the math (my math skills are not good )
And in reality I will just need to have accentric's in the most wide position and leave it that way.

 

Actually did a litte mistake...on the bottom i assumed i have 100mm of clearance and i've measured 99,65mm between 2 bolt centers.