TBO,
I think it is too risky. He needs to average 80 to make a bit over $150k by his bye, and I'm just not confident he will. The difference between Webster and say Tyson, is that we know Tyson is running through the Midfield, so should get at least 80/game. With Webster that is a big question mark. While you might look at him as a Stepping stone, if averages 70-75 he won't make a lot of money, or give you a lot of points. Remember, the key to picking any stepping stone, as opposed to Rookie, is that they need to average just below the last Keeper in that position. In Websters case, as he is a Defender, you need to him average just below what you want/expect from your D6. I think the minimum you should take him on is around 80. If you think he can't do that or better, leave him out. Also, don't get seduced by his round 1 score. Remember St Kilda have a lot of players out round 1, and round 1 scores only affect pricing once, not 3 times like round 3 scores and beyond do.