I currently have some top of the range carbon fibre twill pre-preg for sale. Priced per linear metre (1.27m2).

It is quite easy to match straight cuts where several pieces go together it is harder to hid where it has to curve and overlap so I find it is best to try and do it where it is not seen as easily or make several cuts and overlap the carbon carefully. You will see the curve a little but it does depend on the part too... This one was easy to lay up even with the compound curves..  That latest part is only my 21st ever pre-preg part.. It just takes care and time to get it right... Get the basics sorted with wet lay and out of autoclave carbon before you look to invest in an Autoclave.... If you cannot make a good part out of an autoclave it will still not produce a perfect part in one... 

It goes to show, if you take your time and do it all by the book and understand what you are doing parts can be really nice with other pre-pregs too... No lacquer on here either this is out of the mould and has better clarity than the VTF261 too...

OK no photo of the oven I am using at the moment but to be honest the part I am making is quite small and I dont need a large space so I am just using two card board boxes inside each other to make a double thickness wall and a card divider down the center. Plus a box lid that I can use as a door and somewhere for air to vent and circulate round the box. The divider just allows air to flow round in one direction and not just blow to the bottom of the box and cause turbulence. I will get a photo when I have finished the part tomorrow..

Here is the part just so you get an idea when I tell you where I placed the themometer to check the part temperature as it cooks.


Here is my basic controller. I have wired in a 6 way extension lead so I can run a couple of things from it if I need to use a couple of heaters. 

The thermocouple probe is wired into the controller and these have their own power supply. 

The extension lead has a seperate power supply going through the box and into a Solid state relay. So the box has two plugs on the for power.. You can see three cables in the photo with the 6 way extension two top right and one bottom right. The two top right are power in. The thinner black cable just to power the controller and the white thicker cable to power the heaters and go through the Solid state relay.  The bottom right cable is power out to the 6 way extension. 


Here it is in use.. I set the controller at 65 degrees to get the pre-preg up to the lower flow temperature and let the heater (in this case a cheap hair drier). I placed the probe thermo couple at a point about mid way up and front to back in the side where the part is to be cooked (NOT the side which has the heat being blown directly into the box oven.) 

I also taped my wireless meat thermometer to the outside of the part along the inner straight edge at the bottom edge of the part. As you can see the oven is up to 65 Degrees and after a period of heat soak the part is also at exactly 65 degrees too.... It works very well for small parts and as I can plug anything into the extension I can run one or two hair driers or a 3kw fan heater ect.. I can run any combination of heater up to the rated 30amp plug and cable will allow as the Solid state relay is rated at 40amps too.. My limit is the rating of the power cable and my power supply to the box.  

Thanks for your question. I will take a photo of the spike rollers that we use and put it up this week, I'm not sure exactly where you can buy them from as we order through a company called Monks & Crane who supply all of our workshop consumables (like rollers and handles etc) but there must be an online retailer that will sell them.