Let me start out by saying that this is not a casting tutorial. If you need a specific casting tutorial to add distance then check out the likes of Terry Edmonds who will be able to help you out.
What this is however is a quick tutorial on how to make sure that your bait ends up where you intend it too.
First of all your position in the swim where you are going to cast from must be the same as when you found the spot you want to fish using your marker rod. It is no good going to all the trouble of finding a spot, clipping up, wrapping your rods up to the correct distance to only go and stand in different spot in the swim as your spod will end up several feet away from the spot thus drawing the fish away from your hook bait (this also goes for your fishing rods). When I find an area I want to fish I note down the distance/wraps, skyline marker and position in the swim that I cast from.
Secondly in most instances you will need to clip your spod rod up shorter than your fishing rods. How much shorter depends on the depth of water you are fishing. For example if you are fishing at 44 yards (11 wraps) in 12 feet of water you would clip your spod rod up 3 feet short of 11 wraps. This is because when you cast out with a lead it swings back towards you upon entering the water but your spod does not. The basic equation which I work on is minus 1 foot of distance for every 4 feet of depth. This is not an exact science more my best approximation but this will make sure the free offerings will be as close as possible to your hook bait.
Knowing this means that if you want to fish on the edge of a baited area you can clip your spod rod up at the same as your fishing rods, or move backwards and forward to make a bigger spread of bait. It is up to you and the possibilities are endless.
Thirdly do not alter the finish position of your rod. If your normal finishing position after you hit the clip is at the 10 o’clock position then this must remain the same with every cast. If you hit the clip and then push the rod forward beyond 10 o’clock your spod will end up travelling a few feet further than you intended. Do cushion the rod when you hit the clip so that the spod does not bounce back because this time the spod will end up being short of the mark.
My final tip is practice the more you practice the better you will be. If you have never used a spod or spomb before don’t go trying to bait up at the furthest you can cast start at a comfortable distance say 40 yards and build up from there.