modified: README.md

README.md

@@ -137,7 +137,7 @@ The tracking surfaces can be viewed in a cad program using the output `tracking_
 
 <img src="tracking_geometry.png" width="600px"/>
 
-Assuming this is already done, we describe the data processing.
+Assuming the ACTS geometry is already constructed, we move on to describe the data processing.
 
 ##### Source Links and Measurements
 
@@ -163,12 +163,17 @@ A Kalman filter needs a starting point and those are the `Initial Track Paramete
 Conceptually the process of determining these parameters begins with track seeding.
 
 
-ACTS has a Combinatorial Kalman Filter (CKF) which does both track finding and fitting.  
+#### ACTS CKF 
+
+Currently the default is to use the Combinatorial Kalman Filter (CKF) which does both track finding and fitting.  
 
 
 ### GenFit2
 
 [GenFit](https://github.com/GenFit/GenFit) is a generic track fitting tool built on ROOT and the tgeo library.
+The geometry is constructed and geometry handles are present in the geometry service.
+
+We skip this for now.
 
 
 ## Adding a New Algorithm to Juggler