First and foremost, let me welcome you to AVS's DIY Screen Forum! Thanks for coming on board. We will try to help you realize an exceptional upgrade from your previous White painted Screen.
Just as RS-MaxxMudd LL is roll-able because it contains a lower percentage of :Silver-oriented" Reflective elements to "White", Silver Fire can be made more roll-able through adjusting the same. Silver withheld, combined with an increase in Colorant and UPW will result in a mix that is still a comparable shade of Gray, but that has less gain and reduced detail /color saturation.
Over the years, experimentation with various ratios of Silver & Pearl has been / is the basis for most all the Ambient Light oriented formulas. But Silver, that has always been the key to upping performance to another level....but also being the most unforgiving as far as obtaining a surface that would not show the Bad as easily as it does the Good. Silver has a lot of Black involved....it acts much like the Mirrors in a DLP chip. It's either "On" (reflective) or "Off" (absorptive) It is the disparate difference between the degree of reflectiveness and non-reflectiveness of a mix's composition that can make one see "Spark-.lies" or "graininess". Also, under such a situation, excessive localized gain can result. (Hot Spotting)
PJ brightness and positioning, the darkness of the Mix, how much of the reflectivity is masked by other components, and the smoothness (...or lack thereof...) of the painted Surface can all be factors.
All the RS-MaxxMudd & Silver Fire formulas are specifically balanced to provide maximum gain but with minimal aversive reflection.
But rolling introduces another separate issue. The first thing needed to be considered is that a smooth, low nap roller is the only type that can be used. However the pressure applied when rolling usually results in a much higher percentage of the Silver coated Mica flakes being "Flattened" out, with their surfaces being arrayed perpendicular to the PJ's lens. So with such a higher percentage of the Flakes being positioned as such, the surface will take on more of a "Mirror like" tendency.
High Resolution images, when combined with any degree of graininess and /or irregularities in a surface, seem to highlight every little flaw, and detract from what is supposed to be a pristine, "Open Window" effect.
It is the wide disparity of different viewing / PJ situations Members have to deal with that necessitates that we try our best to interact with every request for advice and recommendation that is presented. Having mixes that are in fact virtually infinite in adjust-ability is a two-way street. Almost any situation can be accommodated, but the more adverse a situation, the more "adjusted" a Mix must be, and then that results in less flexibility as far as surface prep, and the method of paint application.
In the end, it becomes a matter of need/desire that must be balanced with effort. Simply put, the more one needs an exceptional amount of performance, the more complex and involved he must expect the creation of such a screen to be.
PackerHawkeye, in your case, you seem to be abetter candidate for RS-MaxxMudd LL. You could do Silver Fire v2.5 1.0 but the shade of Gray would be the same...or very close. And it would appear you do not need exceptionally high performance in ambient light. RS-MaxxMudd LL is a bit less expensive a mix to assemble....and it can be rolled used the aforementioned Low Nap Roller if the surface to receive the paint is effectively very smooth.