Reger's Benedictus is a very contrasted piece :
a very sweet and dreamy theme
suddenly comes a robust fugue
immediately followed by a big, almost wild, crescendo-climax- decrescendo
which leads to the return of the first theme and to a peaceful end.
Reger's indicated tempi are very very fast, twice too fast for my taste. So I used much slower ones, but tried to respect the proportions between Reger's successive tempi. However, the performance sounds probably "rough" or "excessive", but I tried to express the wide array of affects which follow one another in less than six minutes.
The array of dynamics is quite wide, as the Steinmeyer is able to do. So, it may be necessary to turn up the volume for the first part, but it could be cautious to reduce the sound a bit when the fugue arrives.