Air Pump Topeak Mountain Morph G Bike

Air Pump topeak mountain Morph G Bike Bicycle & Spare Chuck w/ Gauge.
Got this Morph G Mountain bike pump in trade a while back.  Noticed it didn't have a gauge.  Called the manufacturer and they sent a new hose with the built in gauge.  Never got around to installing it.
Pump works great.  Currently set up for Schrader valves but I believe you can flip the guts of the chuck around to make it work with Presta. Please confirm this yourself with Topeak.
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