The transaction fees may turn out to be less with more transactions, because a single transaction can be charged up to 3%, but with several transactions, the average across them tends to be about 2%. If you don't have extra coins to split out, send them to different addresses in 2 or 3 transactions, several hours or days apart. For extra safety, you could withdraw part of them directly to your SR address and the other part to your Electrum address, then change your SR address and send the Electrum coins to SR. That would make it a lot harder to link the coins coming out from the coins going in, which would only require looking for coins going to address linked to the mixer worth 1-3% more than the coins coming out. BTW, you should edit out that bitcoin amount, because it's very specific and should be easy to identify in the block chain. We would be better off if we all used round numbers like 1.0 or increments of 0.1. That's how Zercoin will work.