Question: Am I able to specify the transaction size in a raw transaction without having to send "change" back to myself?
I get some unspent bitcoins
I grab the txid, vout, and scriptPubKey for each Then I get the list of all the addresses and quantities that I want to send to
Let's say my total unspent is 1.00000000 BTC, the total I want to send out to all the addresses is 0.50000000, and it'll be about a 3100 byte transfer that I need to pay 0.00040000 fees for. The way I currently build the destination addresses is to place the address it's coming from (myself) as unspent - tx fees - outgoing, so that would be 0.49600000, the destinations would all be specified, and the fee remains unspecified but deduced by the remainder.
So, this is working for my purposes, but is a little inconvenient. The amount that I'm not sending to anyone sends back to myself and has to be reconfirmed so the funds aren't available until then.
If I had a single unspent address with 100 BTC and needed to send 1 BTC to 15 people, it doesn't seem to make sense to temporarily lock up 85 BTC in the process. If I were to use a client and manually send 1 BTC at a time, the unused funds would remain available, so I feel pretty confident what I'm asking for is possible. Any assistance would be most appreciated.
NOTE: I'm using bitcoind now.