I had my shock pushed my TF Tuned.... they are doing push tunes for Monarchs again.
It will replace the piston with a high flow push piston that reduces stiction....and they will custom shim the shock to give whatever range of low speed/high speed and mid stroke damping you desire.
The shock on my mega is completely different now, TF tuned had the maximum about of compression damping tuned in before they felt it compromised grip, I got more midstroke support and I also had them increase the end stroke rebound a bit....as the monarchs tend to pack down....this nicely emulates the new Rock SHox rapid recovery tune so that the shock stays higher in it's travel without having to resort to beggining stroke rebound settings that buck you around.
They also supplied me with a load of air can volume reducer shims so I could play around with the progressiveness of the spring rate.
It feels like it's a completely different shock. It doesn't feel that much different to my friends pushed DHX5 coil shock.... it was about 90 quid for a service and 40 quid for the push upgrade+tune.
You'll spend 500 odd quid on a DB air (and maybe get 80 quid for your shock)....and what you'll get is a shock with so many dials you'll go OCD trying to get it to feel right and will probably end up with something that feels like crap. The guys over at TF tuned know what they are doing and you'll get a shock back with 95 percent of the performance that you won't be tempted to screw around with.