I have a HW100 not a lefty but I use a pump a FX 4 stage cost me £160. A lot cheaper than even the smallest bottles and a lot less hassle. It has a built in moisture trap so just as dry as a bottle. I have a custom cylinder fitted from A&M gunsmiths and it takes 5-10 minutes to pump up plus I'm disabled with use of only 1 hand and I manage to use it no problems. The 100s max fill pressure is 200bar not sure about the 410s.
I went pump because of not having any where local to fill a bottle and have never had a problem with my pump.